The answer would be when he is unable to perform the job which is option b of the given choices.
A market is a mechanism whereby products and services are exchanged as a result of buyers and sellers coming into contact with one another, either directly or via institutions or intermediary agents.
A market is a place where buyers and sellers can meet and trade goods and services. Markets can be physical like a store or they can be digital like an online retailer. Other examples include the black market, auction
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