Why do you think people believe some theories even if they´re not supported by scientific evidence?

The correct answer would be

1. to understand and have certainty

2. to have control and sense of security.

3. to maintain positive image of one self

Explanation:

Theories that can not be proved or tested or have no scientific evidence about them should not be consider valid, however, some people believe in these theories.

The reason behind these false believe, according studies could be any of these reasons:

1. to understand and have certainty - to understand and have a explanation to satisfy their curiosity.

2. to have control and sense of security - if there is something bother sense of security of individual or group of people.

3. to maintain positive image of one self - to portray them not responsible for any immoral happening or deeds.

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project