Besides yielding such psychological rewards as relief from stress, deep relaxation, if practiced regularly, can strengthen the immune system and produce a host of other physiological benefits.
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Adeep relaxation, if practiced regularly, can strengthen the immune system
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Bone can strengthen the immune system through deep relaxation, if it is practiced regularly
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Cthe immune system can be strengthened as a result of deep relaxation if practiced regularly
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Dwhen deep relaxation is practiced regularly, the immune system can be strengthened
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Ewhen practiced regularly, the results of deep relaxation can be to strengthen the immune system
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正确答案: A