Hi There Friend!
Thank You for posting your question!
Your answer is A. it stretches the quadriceps muscle further.
Based on your choices from the previous answer of Carrittop.
Doing sitting quadriceps is way easier, Yet it does not bring as well of a result as the standing quadriceps. Standing quadriceps stretches the muscle(s) further more making it more preventing from any injuries.
I really hope this helps friend! Feel free to mark brainliest.
