To understand most of today's economic activity in the U.S. economy, we should look at which of the following models?

The forward contract differs from a futures contract in that:

a. the forward contract is to be settled immediately. b. the futures contract specifies a fixed amount and arranged date, whereas the forward contract can be for any amount or date. c. the futures contract cannot be traded in a market, whereas the forward contract can be bought in the market. d. forward contracts are standardized, whereas futures contracts are not standardized.

When a consumer chooses the combination of goods and services to buy, what is she or he trying to achieve?

What will be an ideal response?