Ruth (cuts) her children’s hair once a month. She (does) a good job.
I would say that the best one is C
Example of a sentence that most needs to be revised because it's description is too vague is : we hike two miles uphill in the blooming forest.
Usually, you hike on the mountain not in the blooming forest.
hoep this helps
D. Is correct. The thesis statement is what your entire essay/paper will be about!