Using the analogy of the clock system where the quarters are the numbers 3,6, 9 and 12, which divides an hour into 4 portions of 15 minutes each, a minute into 4 portions of 15 seconds each, it means that a quarter involves the division of something into 4 parts.
These parts are usually equal.
As such the right option is to divide into 4 parts fifty cents one-fourth.
The correct answer is D. A good life comes from doing what makes you happy. Teaching English is what the character really wishes to do whereas his parents obviously think about the financial prospects and not about what makes their son happy.