Child is a noun. Childish is an adjective :)
A primary source is an artifact, a document, diary, manuscript, autobiography, a recording, or any other source of information that was created at the time under study. Therefore a soldier’s diary would be the correct answer as it was written either during or immediately after, while all the others are far from it. They would be considered secondary sources.
Your doctor is worried about you competing in the play-offs this weekend.
The word that correctly completes the sentence is you.
Answer:
D) Involuntarily, he becomes Hyde permanently, and then Hyde kills himself.