tense with 'over the weeks that followed'

[joham]

Without any context, are all four choices possible in the following test question?


Our friendship ______ quickly over the weeks that followed.

　　A. had developed B. was developing

　　C. would develop D. developed

 

[Raymott]

Yes.
But I think D. would be the expected answer. The correct answer is the BEST answer, which means the most obvious; the one that needs the least explaining; the one for which a context is not at all dubious; the most commonly used one; the one that a student at that level should know; perhaps the first one the student would learn ...