In a scientific study, a conclusion can
a. state a theory.
b. ask a question.
c. prove a hypothesis.
d. support a hypothesis.

D support a hypothesis

A conclusion in scientific research summarizes the results obtained from the data of the experiments conducted which can be in support of the hypothesis or can be contradictory to the hypothesis. A conclusion could be defined as summing up of the arguments to draw inferences from the research conducted however pointing null hypothesis is also very important because both accept, and rejection of null hypothesis provides very useful information

1. seasonal

2. frictional unenployment

3. the number of the labor force multiplied by 100 and then subtract the number of unemployed.

4. 4%

5. an increase in prices

your answer would b. the missisipi river

hope i you : )