Which is the right option to complete the following:
"I do not want to help my mom in the kitchen anymore, this morning while __________onions, my eyes started to cry".
b. I was peeling
d. was peeling
In my opinion, both, a) and b) could be possible since a) would be a reduced adverb clause, having originally the same subject in both clauses, whereas b) would be the original common adverb clause. Am I wrong? or is it "b" the only "option and why?