Which statement is an example of a complex sentence?

a. although he denies them, dr. vasquez faced several scandals last year.
b. cars tend to be expensive, but airplanes are in a price range of their own.
c. people tend to use too many clauses in sentences that should be simple.
d. i am in favor of proposition 1, and i am also in favor of proposition 16.

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.

love, how my life is right now. you can be loved and can love others. sometimes you dont feel loved right now, dont worry, someone out there is loving you while you are away.