Of the Following Choices, the Most Effective Way to Stretch

Multiple Choice

Of the following choices, the most effective way to stretch tight lumbar extensor muscles is:

A) In supine, pull both thighs to the chest until the sacrum is lifted off the mat.
B) In long sitting, reach both hands toward the feet as far as possible.
C) While standing, bend over and touch the toes.
D) In prone, perform press-ups.