7 greg would like to provide a more effective controlling idea for his paper. which sentence should replace…

7 greg would like to provide a more effective controlling idea for his paper. which sentence should replace sentence 8 to effectively state the controlling idea of this paper? a quite a bit of knowledge is needed to figure out how the best roller coasters work. b hard work, science, and having lots of other skills are needed to design popular roller coasters. c roller coasters have to be fun, so the scientists who design and build them must know something about amusement parks. d designing an exciting roller - coaster ride involves imagination and creativity, but it also requires using science.

7 greg would like to provide a more effective controlling idea for his paper. which sentence should replace sentence 8 to effectively state the controlling idea of this paper? a quite a bit of knowledge is needed to figure out how the best roller coasters work. b hard work, science, and having lots of other skills are needed to design popular roller coasters. c roller coasters have to be fun, so the scientists who design and build them must know something about amusement parks. d designing an exciting roller - coaster ride involves imagination and creativity, but it also requires using science.

Answer

Brief Explanations:

A controlling - idea sentence should clearly summarize the main point of the paper. Option D best combines the aspects of creativity and science in roller - coaster design, which likely encompasses the main themes of the paper. Options A and B are too general, and option C focuses more on the fun aspect and amusement parks rather than the design process.

Answer:

D. Designing an exciting roller - coaster ride involves imagination and creativity, but it also requires using science.