which is a compound - complex sentence?\no while they were walking on campus, dwayne admired the buildings…

which is a compound - complex sentence?\no while they were walking on campus, dwayne admired the buildings and michelle imagined attending classes in this beautiful place.\no daily exercise is beneficial to your health, therefore you must take several precautions to avoid injuries.\no our experienced tour guide, who grew up in the area, directed us toward some amazing local scenes.\no the electronic merchandise was defective, as it had been severely damaged during shipment.
Answer
Brief Explanations:
A compound - complex sentence has at least two independent clauses and at least one dependent clause. In "While they were walking on campus, Dwayne admired the buildings and Michelle imagined attending classes in this beautiful place", "While they were walking on campus" is a dependent clause, and "Dwayne admired the buildings" and "Michelle imagined attending classes in this beautiful place" are independent clauses. The other sentences do not meet this criteria. The second sentence is a compound sentence with a coordinating conjunction "therefore". The third sentence is a complex sentence with a relative clause "who grew up in the area". The fourth sentence is a complex sentence with a subordinating conjunction "as".
Answer:
While they were walking on campus, Dwayne admired the buildings and Michelle imagined attending classes in this beautiful place.