Explain why tongue rolling ability is a discontinuous variation

He will be able to roll his tongue, because the 'A' allele is dominant over the 'a' allele. ... Tongue rolling is an example of discontinuous variation: you either can roll your tongue or you can't. Other characteristics, for example height and weight, show continuous variation. People come in all shapes and sizes.

0 because theres a difference between pickled peppers and peers.

-hope this : -/

thinking it would be d not too sure but i think it's right