before calling a technician this time, only to learn the culprit was a hairball in a sink drain, i decided…

before calling a technician this time, only to learn the culprit was a hairball in a sink drain, i decided to troubleshoot the plumbing problem myself. i consulted resources and learned that my homes drain, waste, and vent system took advantage of gravity and was designed so that water into my homes drains flowed downhill from start to finish. the waste water from each sink, toilet, shower, tub, and appliance collected into ever larger pipes, finally merging into the main sewer line from my home to the city sewer. based on my research, the fact that i had two sinks, a tub, and the toilets all backing up indicated that the solution was beyond a few simple doses of chemical drain cleaner this time. instead, it was more likely that there was a clog in the main sewer drain from my home, meaning tree roots, a damaged pipe, or a major clog was responsible. according to the passage, which of the following is true about the authors plumbing problems? a they were repaired by professionals using chemical drain cleaners. b they involved interruptions to the flow of gravity - driven water. c they were caused by an incorrectly designed drainage system. d they were caused by the house having too many drains.

before calling a technician this time, only to learn the culprit was a hairball in a sink drain, i decided to troubleshoot the plumbing problem myself. i consulted resources and learned that my homes drain, waste, and vent system took advantage of gravity and was designed so that water into my homes drains flowed downhill from start to finish. the waste water from each sink, toilet, shower, tub, and appliance collected into ever larger pipes, finally merging into the main sewer line from my home to the city sewer. based on my research, the fact that i had two sinks, a tub, and the toilets all backing up indicated that the solution was beyond a few simple doses of chemical drain cleaner this time. instead, it was more likely that there was a clog in the main sewer drain from my home, meaning tree roots, a damaged pipe, or a major clog was responsible. according to the passage, which of the following is true about the authors plumbing problems? a they were repaired by professionals using chemical drain cleaners. b they involved interruptions to the flow of gravity - driven water. c they were caused by an incorrectly designed drainage system. d they were caused by the house having too many drains.

Answer

Answer:

B. They involved interruptions to the flow of gravity - driven water.

Brief Explanations:

The passage states that the home's drain, waste, and vent system uses gravity (water flows downhill). The plumbing problems (sinks, tub, toilets backing up) indicate an issue that disrupts this gravity - driven water flow. Option A is wrong as the author decided to troubleshoot himself and the problem was beyond chemical drain cleaners. Option C is incorrect as the system was designed to use gravity (no mention of incorrect design). Option D has no basis in the text.