Pick the producer who would come closest to operating in a perfectly competitive environment

In the U.S. economy, a large portion of investment decisions are made by

A. households. B. the private sector. C. the public sector. D. international organizations.

The marginal propensity to consume:

A. is closely linked to the multiplier effect of government spending. B. is the amount by which consumption increases when after-tax income increases by $1. C. is a value between 0 and 1. D. All of these are true.