SVA Rule #14. 

When gerunds are used as subjects, the verb is always singular.

Going to the movies is a common way for people to relax.

 Learning a foreign language is easier at a young age.

 Example #29. 

Taking tests and giving presentations stress many people out, but it does not stress me out.

  2. stresses many people out, but it does
  3. stress many people out, but they do
  4. stresses many people out, but they do


Click to see the correct answer The correct answer is choice C.