Answer:
a. makes normative statements.
Explanation:
In Economics there are two type of statements: positive statements and normative statements.
Positive statements describe an aspect of reality, while normative statements try to establish what ought to be about an aspect of reality.
For example, a positive statement is: the inflation rate is 4%.
While a normative statement is: the inflation rate should be between 3% and 4%.
When an economist uses normative statements, he is not only a scientist, but a policy adiviser as well, because he is using his knowledge to recommend actions that affect society, and that are political.