The "invisible hand" refers to a. the fact that social planners sometimes have to intervene, even in perfectly competitive markets, to make those markets more efficient. b. the automatic maximization of consumer surplus in free markets. c. the equality that results from market forces allocating the goods produced in the market. d. the marketplace guiding the self-interests of market participants into promoting general economic well-being.

OPTION (D)

Explanation:

Invisible hand also refer to OPTION (D), which states that marketplace have to guide the self-interests of participants at market to further encourage the well being of normal economic.

Invisible hand is basically a benefit socially, and it cant be seen but manages the economy of the market. And it also gives rights and supports the demand and as well as supply of the products in a market which is free.

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;