the above screenshot might help answer your question
Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
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Without enough red blood cells, your body can't get enough oxygen, causing fatigue. Episodes of pain. Periodic episodes of pain, called pain crises, are a major symptom of sickle cell anemia. Pain develops when sickle-shaped red blood cells block blood flow through tiny blood vessels to your chest, abdomen and joint.
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you are welcome :)
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I say B, because One meal a day could kill her if she she is obese, and if she changes nothing in her activities she wont loose fat easily and fast even if she is on a diet, and lastly if she exercises without change in her diet its no use because you can exercise for hours and then regain the fat you lost with the amount of food you ate. So technically B is correct.
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