Which of the following countries is considered to be a core state according to the world systems theory?

After obtaining congressional control in 2010, Republicans passed laws requiring government-issued photo IDs in many states for voting

Indicate whether the statement is true or false

When the results of a study can be generalized across settings, situations, and environmental conditions, the study has

a. treatment variation validity. b. outcome validity. c. temporal validity. d. ecological validity.