The idea of invisible ink had been around for a long time.
Write using lemon juice as ink, for instance, and the
writing will be invisible. Heat the paper, and the writing
will appear, looking as if it were written in brown ink.
British agents used two types of ink. One could be made
visible by holding the paper over the flame of a candle;
the other could be read by applying a common chemical.
Major John André, the chief British intelligence officer in
New York, told his agents to put an F in the corner of
letters containing invisible ink needing fire to read and A
for those needing acid.
-George Washington, Spymaster,
Thomas B. Allen
What is the central idea of the passage?
* Invisible ink isn't really invisible at all.
Lemon juice is the earliest form of invisible ink.
British agents used invisible ink to send secret
messages.

The correct answer is

C: British agents used invisible ink to send secret messages.

Explanation:

In the time of the war the people needed to figure out a way to tell secrete messages to others without getting caught it explains in this passage the use of invisible ink.

Hope this helps you and have a great day!

answer: b. grete might have remained as shy and immature as she was at the beginning of the story.

one of the most interesting characteristics of gregor's metamorphosis is that, although he is the only character who has physically changed, it is this same change which triggered a transformation in the rest of his family.

by taking care of gregor, grete has become stronger and more confident. she has found a life outside of the house, and has become more independent and self-sufficient. the novel implies that the trigger for the change is gregor's own transformation, and that without it, grete was likely to remain as shy and immature as she was at the beginning of the book.

explanation:

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long