The Breast Muscle of a Wild Duck Is Dark,while That

The breast muscle of a wild duck is dark,while that of a domesticated chicken is white.The breast muscles in a wild duck are

A) fast-twitch muscles with abundant capillaries and mitochondria.
B) slow-twitch muscles with few capillaries or mitochondria.
C) slow-twitch muscles with abundant capillaries and mitochondria.
D) fast-twitch muscles with few capillaries or mitochondria.
E) a mix of fast-twitch and slow-twitch muscles.