Please help! which statement best distinguishes between the function of genes and alleles? responses genes provide variation in traits, while alleles express traits.

A genes provide variation in traits, while alleles express traits.

B. alleles are responsible for variation in traits, while genes are responsible for the expression of traits.

C. alleles provide duplicate copies in case of mutation, while genes express all mutations

D. alleles provide duplicate copies in case of mutation, while genes express all mutations.