Mutations:
a. often change a person's blood from type A to type AB
b. occur only when the DNA is transmitted to a daughter cell
c. are responsible for heritable variations seen in progeny
d. when occurring on a particular Okazaki fragment can lead to different loci

Explanation:

Heritable variations comes from mutations

Mutations are the initial cause of new heritable traits, if we take an example of  a rabbit which can't choose to have a different fur color

Rather, a genetic mutation causes a difference in fur color, which may help that rabbit hide better in its environment

Mutation is one of the causes of natural selection as a result only superior genotype is favored and inferior genotype is eliminated              

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

i think that the best answer would be c.

tell me if im wrong : )