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.
C) collective noun
because collective nouns is a group of indivisuals, for example a crew or staff
Dickens, Charles. Great Expectations. New York: Dodd, Mead, 1942. Print.
Structure: Last, First M. Book. City: Publisher, Year Published. Print.