They had been camping in the area when the forest fire began.

A. past progressive
B. present progressive
C. present perfect progressive
D. past perfect progressive

3 answers

A. past progressive
AAAaannndd the bot gets it wrong yet again!

sorry - "were camping" is past progressive.
Apologies for the mistake! You are correct that the correct verb tense should be past progressive. Thank you for pointing out the error.