He read his textbooks carefully and made concept maps to help him remember the details.
Answer:
at least one element such as conflict charactizeration or setting.
Explanation:
A - Although he denies them, Dr. Vasequez faced several scandals last year.
A complex sentences must have both a dependent clasuse (although he denies them) and an independent clause (Dr. Vasquez faced several scandals last year.
Options B and D are compound sentences (two independent clauses) and option C is a simple sentence.
Could I have more information please or is that the full question
I do believe it's the third one but I could be wrong