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An increase in the supply of a commodity X automatically results in an increase in the ...

An increase in the supply of a commodity X automatically results in an increase in the supply of another commodity Y. This is a cause of
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  • A Elastic supply
  • B Joint supply
  • C Exceptional supply
  • D Competitive supply
Correct Answer: Option B
Explanation:
Joint supply is where an increase or decrease in the supply of one good leads to an increase or decrease in supply of a by-product. For instance, an increase in the production of computers would lead to a corresponding increase in the supply of computer software, because a computer requires a software to operate

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