Put the following events of excitation-contraction coupling in the order in which they occur.
1) Excitation
2) Sarcomere shortening
3) Generation of muscle tension
4) Neural control
5) Contraction cycle begins
6) Release of calcium ions
A) 4,1,5,2,6,3
B) 4,1,6,5,2,3
C) 1,2,5,6,3,4
D) 6,1,4,2,5,3
E) 1,4,6,2,5,3