Answer :
I would say 2 (c.)
Heartbeat less than 60 = 0.
Slow heartbeat (60 - 100 beats per minute) = 1.
Adequate heartbeat (more than 100 beats per minute) = 2.
Heartbeat less than 60 = 0.
Slow heartbeat (60 - 100 beats per minute) = 1.
Adequate heartbeat (more than 100 beats per minute) = 2.