Answer:
B. Tense muscles
Step-by-step explanation:
When stressed, we automatically tighten the jaw muscles and those around the eyes and mouth, as well as the neck and back muscles. These muscles tense at the same time to prepare the body to react and then relax when the stressful situation disappears. For this reason, we can conclude that stress can cause muscle tension.
This tension is a reflex reaction to protect us and is not really harmful except when stress becomes a chronic state. In this case, the muscles never relax, but remain in a state of constant tension.