For safety concerning a curve, you should:
a. decelerate before the curve
b. accelerate while driving up the curve
c. shift to a higher gear
d. adjust your speed to the current road conditions

The question is asking us what you should do "For safety concerning a curve. The correct answer is that you should : A. decelerate before the curve, this would reduce your speed, and also the time needed to break, so you will have more time to react to the environment and also you would need less time if you see someone on the road and decide to break.

Gotta have a picture ^^