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.
The detail "...make sure they are not touching each other..." best supports the inference that one bad apple can spoil all the others. As stated in the text, the fruits are stored in the hoard house for future consumption. It is important that one does not contain a bruise since this will also affect the others around it.
Explanation:
Her passionate speech about the importance of fighting for justice was moving.
The eager looks on the students' faces showed that they were ready.
The performers appreciated the enthusiastic applause they received after the show.
The soccer team was excited about earning a spot in the playoffs after the recent win.