The correct answer is a.: specific.
This structure (this +adj) requires an adjective and the only adjective is in a., the other options are verbs or nouns and are not correct.
Answer:
was April eating
Explanation:
It creates the sentence
what meal was April eating when she got sick?
Answer:
Traveling from one place to another.
I sorry, but if you can send the book or story about Dr.Brand I may be able to help.