How does adam smith describe a successful interaction between a buyer and a seller?

As indicated by Smith, the aggregate wants of the apparent multitude of individual buyers and sellers in a free economy work normally to achieve:

Explanation:

As indicated by Smith, the aggregate wants of the apparent multitude of individual buyers and sellers in a free economy work normally to achieve: Production of the most wanted and helpful merchandise in the most proficient way conceivable, since the seller who most effectively does this picks up the best piece of the pie and incomes.

christopher columbus (1492–1504)

i also think it is c