A would be the best answer because if you really want to make a difference then you need to take action the right way so A makes the most sense.
It is a metaphor, a comparison without using like or as.
B. It was his 52nd birthday.
Answer:
Light is correct!
Explanation:
When studying, you don't want to see clutter or movement, you don't want to have to hear noises-- each of these distract you from having the clearest mind possible, when your attention should solely be on studying!