Hi there! The answer is D. 8%
To find the percentage of the customers who preferred the hazelnut bar we need to know two things:
First we need to know the total amount of customers, which is 50.
Second we need to know how many of these customers preferred the hazelnut bar. This bar is preferred by 4 people.
Now we can fill in the following formula, in order to find our percentage:
[tex]\% = \frac{part}{total} \times 100 \% = \frac{4}{50} \times 100 \% = 0.08 \times 100 \% = 8 \% [/tex]
Hence, the answer is D. 8%
~ Hope this helps you!