"they went out of the forest" is just a point of time; until doesn't work here in that it refers to a period of time.Nearly a month had gone by _____ they went out of the forest.
A. until B. while C. before D. after
(The given answer is C.)
I'd like to know if A is also fine. And why?
Let's see how natives will explain the question.
Student or Learner