If Myosin Head Groups Were Unable to Hydrolyze ATP Due

Multiple Choice

If myosin head groups were unable to hydrolyze ATP due to an alteration in the protein structure but could still bind and release ADP and inorganic phosphate (P_i) , which step in the actin-myosin cycle would NOT take place?

A) dissociation of the myosin head group from the actin filament
B) repositioning of the myosin head group on the actin filament
C) attachment of the myosin head group to the actin filament
D) the "power stroke" conformational change in the myosin head group
E) the conformational change in the myosin head group in the presence of Ca²⁺