Seeing as he is frustrated with them, and frustration is commonly associated with headaches, he would like feel C. Headache.
Answer:
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There are three types of muscle contraction: concentric, isometric, and eccentric.
Concentric: In a concentric contraction, the muscle tension rises to meet the resistance then remains stable as the muscle shortens. During eccentric contraction, the muscle lengthens as the resistance becomes greater than the force the muscle is producing.
Isometric: An isometric exercise is a form of exercise involving the static contraction of a muscle without any visible movement in the angle of the joint.
Eccentric: An eccentric (lengthening) muscle contraction occurs when a force applied to the muscle exceeds the momentary force produced by the muscle itself, resulting in the forced lengthening of the muscle-tendon system while contracting
I think it’s trust because if you don’t trust them mostly likely you would get jealous because you might think they are gonna cheat on you and get jealous if they talk to someone you might think there flirting and everything will go down hill I think not sure