Read the following sentence:
Health advocates often encourage their friends to do exercises because they know how important they are.
Select the sentence that clarifies the meaning:
Health advocates often encourage their friends to do exercises with them regularly because they know how important they are.
They often encourage them to do exercises because they know how important they are.
Health advocates often encourage their friends to exercise because health advocates know exercise is important.
Health advocates often encourage them to do exercises because they know how important they are.