neural signal through autonommic nervous system (ANS) can
a. Increase the heart beat rate
b. Decrease the heart beat rate
c. Increase the strength of ventricular contraction
d. Decrease the speed of conduction of action potential
e. Increase cardiac output
f. Decrease cardiac output
A. b,c and e
B. a,d and f
C. b,d and f
D. a,c and e