In a muscle cell, myosin binds to actin to cause muscle contraction. Researchers have found that rabbit muscle myosin binds to actin from an amoeba. How can this be?

A)The myosin from amoeba and rabbits is similar due to a distant common ancestor.
B)The differences in myosin between amoeba and rabbits do not affect the actin-binding site of myosin.
C)Proteins whose functions are important to many types of organisms are more likely to be conserved.
D)The myosin from amoeba and rabbits is similar due to a distant common ancestor, and the differences between them do not affect the actin binding site.
E)All of these choices are correct.