What is the source of the demand for dollars in the market for foreign-currency exchange?

Deficit spending

What will be an ideal response?

An implicit cost is defined as:

A) the opportunity cost of using a resource that is not explicitly paid out by the firm. B) the difference between an input's explicit cost and its actual cost. C) the amount by which economic profit exceeds accounting profit. D) the amount by which the money spent on an input to production exceeds its opportunity cost.