. Patience and Celeste were having a friendly debate about how our bodies work. Patience pointed out that even when she was just standing still, her muscles seemed to be doing a little dance to keep her upright. Celeste was curious and asked, “What is this continuous and passive partial contraction of muscles called that helps us maintain our posture?”

A. Muscle tone

B. Muscular system

C. Fascia

D. Tendons