1. I'm very happy because I can go to school and study now.

Question

2. I'm very happy that I can go to school and study now.

3. I'm very happy I can go to school and study now.
--------------
Are both the same in meaning? Which one is popular, 'because' or 'that'?
Is #3 correct where 'that' is deleted.

Answer 1

All are correct.

The second and third are most commonly used.