The answer is going to be true
A gear. The two gears feed into each other
Well first off, sky and pie are both alike because they rhyme. and they're different because they have complete different meanings, sky as the region of the atmosphere and pie is a baked desert.
If you are sure that A and D are not the answers, and if you are that there are three correct answers, then logically the correct answers are B,C, and E.
Have a good day :)