Theories have both an explanatory and a predictive function.
a. true
b. false

true

Explanation:

Theories have both an explanatory an a predictive function.

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.