B. were formed make up the verb phrase.
A verb phrase is a phrase composed of verbs, whether the verbs be an action verb or a linking verb.
Writers use action verbs to depict action. They use linking verbs to describe conditions. However, there are instances when action and condition happens at the same time; thus, verb phrases are made.
In the verb phrase "were formed", were is the linking verb describing condition while formed is an action verb.
"<span>As of some one gently rapping, rapping at my chamber door."</span>
The correct answer here is c. more lazily.
Why? Because a. lazilier and d. laziliest are grammatically incorrect words, therefore not correct. B. most lazy is grammatically correct but it does not fit here because the sentence compares two things (so you need a comparative "more"), while the superlative "most" requires at least three things to be compared.