W hich of the following is NOT one of the ways in which cardiomyocytes differ from skeletal muscle fibers?

A) Cardiom yocytes have a greater volume of mitochondria than skeletal muscle fibers
B) There is on average one T-tubule per sarcomere in cardiomyocytes, two in skeletal muscle
C) Most cardiomyocytes have 1-2 nuclei; skeletal muscle fibers have many
D) Cardiomyocytes make electrical connections between adjacent cells, skeletal muscle fibers do not
E) Cardiomyocytes do not require external stimulation whereas skeletal muscle fibers do