Which of the following is not a reason why historians study societal change?
a. to make better plans for the future
b. to predict future patterns and trends
c. to make inferences about causal relationship
d. to estimate how long it would take to build a road system
The only option that is not generally a reason why historians study societal change would be "d. to estimate how long it would take to build a road system," since this requires a separate type of research.
