Which choice best completes the sentence in standard written English?
- Asupport
- Bsupportscorrect
- Chave supported
- Dwere supporting
Why B is correct — and why the others are not
The true subject is "list," which is singular, so the singular verb "supports" is required. This matches the evidence or condition involving The list of examples in the doorway summary from. A final check is using the nonessential phrase only after finding the main clause.
A. This verb incorrectly agrees with a nearby plural noun rather than the singular subject "list."
C. This verb phrase does not agree with the singular subject "list."
D. This option uses a plural or progressive form that does not fit the sentence's subject and meaning.