Give a example of a mutation that is beneficial and a general explanation of how it is so

Examples of Beneficial Mutation. Mutation, a change in the sequence of genes, is divided into various types such as beneficial, harmful, and neutral, based on their effects. ... Germ-line mutation occurs in the germ cells, and is inherited by the offspring via the reproduction cells.

Explanation:

not sure if this what   you'r looking for would be percent composition

i think the answer would be d