It wouldd be a and d you welcome
C is the complex sentence because it contains the word while and an independent and dependent clause! :)
Since we don't know which verb is underlined, I will just write the sentence with all verbs in past tense.
The Dobbs filed a complaint with the main office, and a vice president offered to personally investigate the problem.
Answer:
B
Explanation:
Because it has a clear answer that probably wouldnt be asked unless you werre quizzing/testin someone on their knowlege of courtroom rules.