The correct answer should be reward
Predicate nominative is basically a noun that is used as a predicate instead of a verb and stands next to copulative verbs such as is. In this case, the example says "theophylline is (the) reward" where you can see reward being the predicate nominative.
The developement of the cellular phone. When you see the word 'developement' this should be a huge hint.
Answer:
Nathan Hale? If so, yes he is because he was a spy who helped during the American Revolution and sacrificed his life for his nation. Because of him and people like him we are free from Britain and our own superpower nation.
Explanation:
Well, first of all, your writing is lacking.
* wildy?? - I suspect you mean 'wildly.'
* The comma and period in Answer D I suspect were NOT intentially omitted.
* Answers B and C are identically worded.