The answer would be D) External conflict because its a battle between one character and another so this is just like an ex of Batman vs The Joker, both of them are characters and they are in a fight against each other and this is a external conflict since its a character vs character thing, its not exposition, its not internal conflict because that's a problem in the inside like what should I do, and not resolution because that's like the solution to a problem.
1. Cat's (singular possessive)
2. boss's (singular possessive)
3. elephants' (plural possessive)