Which group of words is an adjective clause in the sentence? the Artic region, where winters are long and cold, is home to more than 400 species of flowering Plants?

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