I believe the answer is B
Answer:
using a semicolon between the clauses only with a conjunction
2nd one
For example, forests help the environment by soaking up carbon dioxide, conserving soil, and preventing flooding.
The correct pronoun to be used in order to complete the sentence is the pronoun "she". So the complete sentence should be "She was elected to choir office", not the pronoun "it", because the verb "elected" only refers to a person. "It" can't be used to agree with the given verb.
