What Is the Correct Order of Events That Occur During

What is the correct order of events that occur during muscle contraction?
1) muscle shortens
2) calcium binds to troponin
3) filaments slide
4) T tubules are depolarized
5) acetylcholine is released
6) ATP molecule is split

A) 4 → 5 → 2 → 1 → 3 → 6
B) 4 → 2 → 5 → 6 → 1 → 3
C) 5 → 2 → 4 → 1 → 6 → 3
D) 6 → 2 → 5 → 4 → 3 → 1
E) 5 → 4 → 2 → 6 → 3 → 1