Answer:
Energy bar B has the highest rate of sugar to fiber.
Explanation:
For energy bar A, the rate is
=
For energy bar b, the rate is
=
For energy bar C, the rate is

Now,
The least common multiple of 4 and 6 is 12.
So, we can write

and

From the above information, we can easily find that energy bar B has the highest rate of sugar to fiber.