Welcome to Using English, tranlam.
2. They are both correct.
3. In multiple choice questions we expect you to make a choice first, with a reason for your answer. We may then comment.
Note that 'Every day' should be two words and 'exercises' is spelt wrong.
In future, please ask unrelated questions in separate posts, giving each a title which includes a word or words from the phrase being discussed (see the Posting Guidelines). Thank you.
Student or Learner