By the time the city council opened the time capsule, the water inside _________ the handwritten letters.

5
writing

Which choice completes the text so that it conforms to the conventions of Standard English?

A

had ruined

B

will ruin

C

is ruining

D

ruined

Correct Answer: A

Choice A is the best answer. The sentence uses the phrase "By the time," indicating one past event happened before another. The past perfect "had ruined" is required.