A client has overactive hamstrings. The Corrective Exercise Specialist plans to perform a session of neuromuscular stretching $($NMS$)$ with the client. What are the recommended guidelines for NMS$?$

Select one:

a$.$ Contract $30$ seconds to $1$ minute, $6-8$ repetitions per stretch

b$.$ Contract $15$ to $20$ seconds, $1-6$ repetitions per stretch

c$.$ Contract $1$ to $7$ seconds, $1-3$ repetitons, per muscles group

d$.$ Contract $7$ to $15$ seconds, $1-3$ repetitions per stretch