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.

c hydrophobia is the answer

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.