If there are rapid diseconomies of scale in a market, that market is likely to include many firms of various sizes.
Diseconomies of scale can be decribed as one that do take place in acase whereby a business expands so much that the costs per unit increase.
It should be noted that It do occur when economies of scale no longer function, hnece If there are rapid diseconomies of scale in a market, then in that marlket there is likelyhod of many firms of various sizes.
Therefore, the last option is correct.
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