How to do a valdez<br>Sit upright with your left leg extended in front of you, and your right leg standing bent. Point your left toe straight ahead. You should feel the muscles in your left leg tighten as you stretch your toes.

Can we draw the following conclusion?
To begin a valdez sit upright with your left leg extended in front of you. 

pick from the following.
[a]. Yes;
[b]. It's impossible to say;
[c]. No;
[a].