Recruitment is the increase in the number of motor units that are stimulated to produce a contraction with greater tension. Is it possible for cardiac muscle tissue to exhibit recruitment?

a. Yes, because cardiac muscle tissue has intercalated discs that recruit more motor units as the muscle increases contractions.

b. Yes, because cardiac muscle tissue must recruit more muscle cells as the heart increases contractions during exercise.

c. No, because cardiac muscle tissue has striations and increase tension without needing recruitment.

d. No, because cardiac muscle tissue has intercalated discs that allow the entire muscle to contract together, leaving nothing to recruit.