Keep body and soul together means
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Be alert
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Not to day dream
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Earn sufficient amount of money in order to keep yourself alive.
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None
'Keep body and soul together' means to earn just enough money to stay alive and maintain basic existence. Option C correctly captures this meaning of financial survival. The phrase expresses the struggle to maintain the minimum standard of living. Options A and B incorrectly suggest alertness or mental focus rather than financial survival.
'Keep body and soul together' is an idiom meaning to earn just enough money to survive or stay alive, especially in difficult circumstances — matching option 3 exactly. It does not mean being alert or avoiding daydreaming, which are unrelated meanings invented as distractors. The idiom specifically centers on economic survival, not mental state or attentiveness.