read the excerpt from \tools of the spymaster.\ james jays invisible ink did not become visible by heating…

read the excerpt from \tools of the spymaster.\ james jays invisible ink did not become visible by heating. as he described it, his ink \would elude the generally known means of detection, and yet could be rendered visible by a suitable counterpart.\ jays invisible ink consisted of two chemicals. an agent used one chemical to write an invisible message. to read the message, the reader had to brush a second chemical on the paper, that chemical made the message visible. the two - bottle system, supplied by jay, gave washington the secure form of writing that he wanted. which statement best expresses the central idea of the excerpt? james jay was a spy for the americans and had knowledge of chemistry. james jays system required two chemicals for writing and reading invisible ink messages. james jay believed secret messages that became visible because of heat were not secure. james jays invisible ink system allowed washington to read secret messages

read the excerpt from \tools of the spymaster.\ james jays invisible ink did not become visible by heating. as he described it, his ink \would elude the generally known means of detection, and yet could be rendered visible by a suitable counterpart.\ jays invisible ink consisted of two chemicals. an agent used one chemical to write an invisible message. to read the message, the reader had to brush a second chemical on the paper, that chemical made the message visible. the two - bottle system, supplied by jay, gave washington the secure form of writing that he wanted. which statement best expresses the central idea of the excerpt? james jay was a spy for the americans and had knowledge of chemistry. james jays system required two chemicals for writing and reading invisible ink messages. james jay believed secret messages that became visible because of heat were not secure. james jays invisible ink system allowed washington to read secret messages

Answer

Brief Explanations:

The text describes James Jay's invisible ink system which required two chemicals - one to write (invisible ink) and another (applied on paper) to make the message visible. This directly aligns with the option stating his system needed two chemicals for writing and reading. Other options are incorrect: there's no mention of Jay being a spy for both, heat not being secure (the issue was about detection methods, not heat security), or the system allowing Washington to read (it's about the chemical - based process of the system itself, not Washington's ability; the system was for creating and reading messages in general as per its chemical - two - bottle setup).

Answer:

James Jay’s system required two chemicals for writing and reading invisible ink messages.