Which of the following is an example of a run-on sentence?
A. The music was incredibly loud, and Sheila loved every song.
B. The garden was in full bloom; the sunflowers were the tallest.
C. Although she was positive she had finished her homework.
D. Lindsey was exhausted she had not gotten enough sleep for weeks.
I think your answer would be D. Lindsay was exhausted she had not gotten enough sleep for weeks. Because it should be two sentences- Lindsay was exhausted. She had not gotten enough sleep in weeks.