I would say the third one would be the correct or the second one
Im sorry but this is not a quotient problem but an addition one, I can still simplyfy it for you though.
answer :
Touch the x axis means the zeroes (y=0) of theh equation aka the roots aka the solutions
ok, so remember that the degree of the polynomial will be the maximum number of roots so therefor
minimum degreee is 5th degree