The correct option is A went
Tense is used to provide more information about an action ( its time, completeness, etc.). Option A) went is correct as the principal cause uses the past perfect tense and therefore, the subordinate clause must use the simple past tense. The other options are wrong as the principal clause is in the past perfect tense and therefore, present or future tense cannot be used in the subordinate clause. The correct answer is A)went.