Which is a compound-complex sentence?
While they were walking on campus, Dwayne admired the buildings, and Michelle imagined attending classes in this beautiful place.
Daily exercise is beneficial to your health, therefore you must take several precautions to avoid injuries.
Our experienced tour guide, who grew up in the area, directed us toward some amazing local scenes.
The electronic merchandise was defective, as it had been severely damaged during shipment.

Respuesta :

a comma (,) is complex so it is:
compound
While they were walking on campus, Dwayne admired the buildings, and Michelle imagined attending classes in this beautiful place.
combine, too!
A compound-complex sentences contains AT LEAST TWO independent clauses and AT LEAST ONE dependent clause.
Having that in mind, the correct answer is A. While they were walking on campus, Dwayne admired the buildings, and Michelle imagined attending classes in this beautiful place.
Here, 'while they were walking on campus' is the dependent clause, 'Dwayne admired the buildings' is the first independent clause, and 'and Michelle imagined attending classes in this beautiful place' is the second independent clause.
B is incorrect because there are two independent, and no dependent clauses; C is incorrect because there are one independent and one independent clause; D is incorrect because of the same reason.