as for this why do u think it's C or D ? when function is max or min ? and you should not have any problem with that if you don't know say but you are on the right track it's correct answer (one of those)

as for this

odd function is function that satisfy and even function is meaning that you need to put (-x) in every place of x in function and see which conditions does it satisfy

P.S. you need function that does not satisfy any of that two conditions