I believe the answers are B, C, and D.
B. to insert at intervals.
Intersperse is a verb, and it's dictionary meaning is: "<span>scatter among or between other things; place here and there."
ie, "the conversation was interspersed with silences".</span>
It really depends on the question, although if you were not given a prompt, here are some ideas:
Dogs are great emotional support animals.
Dogs have hair.
Anything can be a thesis, as long as you can back your thesis up with at least three proofs.<span />
