Question

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 includes explicit information from the excerpt? washington asked james jay to invent a form of invisible ink. washington only knew about invisible ink that required heating. james jay was a doctor who had knowledge of chemistry. james jay created an invisible ink system that required two chemicals.

Explanation:

The excerpt clearly states that Jay's invisible - ink system consisted of two chemicals. One was used to write the message and the other to reveal it.

Answer:

D. James Jay created an invisible ink system that required two chemicals.