Anew trait that allows a more efficient release of energy from food appears in a fly population. the trait proves beneficial to survival and quickly spreads through the population. which is the most likely origin of the new trait? a. the mutation of a gene that results in an altered protein b. the adaptation of a new genes to existing genes in the digestive system c. the combination of recessive genes in each generation d. the replication of a gene that produces an increase in rna ! will award brainliest (: