Which statement best expresses the central idea of the excerpt?
James Jay was a spy for the Americans and had
knowledge of chemistry.
O James Jay's invisible ink system allowed
Washington to write secret messages.
James Jay believed secret messages that became
visible because of heat were not secure.
O James Jay's system required two chemicals for
writing and reading invisible ink messages.

James Jay’s system required two chemicals. One, called white ink and another to make the invisible... visible.

It could be 1, 2, or 4, depending on the context.1.) they could have had a fight, and she is too humble to say anything further. she wants robert to say something first.2.) maybe he's staring at a computer playing tetris while she's wearing a *really* tight red dress. just sayin' xd3.) is unlikely given that it's only one sentence worth of context long. 4.) it's possible their relationship is more 'mutual hatred' and they tolerate one another.it could be 1, 2, or 4, as long as you can provide sufficient explanation why. remember this as you write!