Suppose you wish to test the effect of a drug on the well-being of depressed individuals, using a standardized "well-being scale" that ranges from 0-20. Higher scores indicate greater well-being, meaning that the drug is having a positive effect. You measure an individuals' well-being first, then administer the drug, and then measure their well-being a week after they've been taking the drug.

What type of design is this?

• A.matched pairs design
• B.simultaneous measurement design
• C.repeated measures design
• D.two independent groups design