Final answer:
To find h(4) for the function h(x) = 4x, substitute 4 for x, which gives h(4) = 16, making option A the correct answer.
Step-by-step explanation:
When finding h(4) for the function h(x) = 4x, you simply replace x with 4 and calculate the result:
h(4) = 4(4)
h(4) = 16
Therefore, the correct answer is A) h(4) = 16.