Which are characteristics of scientific questions? check all that apply.

a. asking about subjective matters

b. having a wide focus on many topics

c. addressing a gap in knowledge

d. possibly leading to a testable hypothesis

e. already having fully confirmed explanations

The correct answers are letters c and d.

Effective research is based on gaps in human knowledge, hence any contributing attempts regarding science should enrich previous research by either innovation or expansion of previous information.

In the same way, deductive knowledge as the base for empirical research requires a process where hypothesis may be tested.  Therefore scentific questions would ideally set the baseline for such experimentation to happen.

answer; the federal reserve system;