Which sentence is a compound-complex sentence? (plz help me!!! I've been stuck on this forever!)

A. Most people don't believe Bigfoot exists, but it is known around the world by a variety of names, including Yeti, Sasquatch, and Momo.

B. My sister collects unicorns and has stuffed ones, ceramic ones, and even a carved wooden one that's a foot tall.

C. Although most people think the Loch Ness Monster is a hoax, tourists come from around the world to search for her, and they enjoy visiting the Scottish Highlands.

D. Centaurs are fascinating creatures from Greek mythology with the torso of a human but the legs of a horse.

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.

i cannot see a paragraph to answer the question

ok if it wasn't the hans one it was probably c or he thought the mountain was collapsing on them.

may we see the excerpt?