Correct sentence: The ball was dropped on the 10-yard line, while scrambling for the touchdown. Explanation: Modifier was the part after the comma because it had no subject.
For the answer to the question above, I believe it is various forms of be.
The most common linking verbs are, am, is, are, was, were, being, and been, so the correct answer is the third choice among the given questions.
I think the answer to this question is True.
