Put the following events of the contraction cycle in the order in which they occur.
1) Cross-bridge detachment
2) Cross-bridge formation
3) Active site exposure
4) Myosin reactivation
5) Calcium ions bind troponin
6) Myosin head pivoting
A) 5,3,6,2,1,4
B) 5,3,2,6,4,1
C) 5,3,2,6,1,4
D) 5,3,6,2,4,1
E) 3,5,2,6,1,4