When economists are trying to help improve the world, they are a. policy advisers. b. scientists. c. in the realm of macroeconomics rather than microeconomics. d. in the realm of positive economics rather than normative economics.

the most suitable answer is d. in the realm of positive economics rather than normative economics.

Explanation:

Postivie economics are based on facts and observations which can be proved right or wrong in a scientific and a rational way while Normative economics are based on individual values and jugdements.

Positive economics gives a path to the reality and thus enable to improve the prevailing economic conditions.

answer; microeconomics;

answer; buying the bill at a discount from the face value to be received at maturity;