The bookstore does not have enough copies of a new book to meet demand. What could the bookstore do to increase supply?

Answer is in the photo. I can only upload it to a file hosting service. link below! Good Luck!

https://cutt.ly/wzdvC7R

The question says,'validity that involves how well a study is designed and administered is validity. The correct option is A. internal validity refers to how well a research project was conducted. The objective of most projects is to show that one variable causes a change in another variable, therefore it is part of internal validity to ensure that more than one independent variable do not act at the same time.