Answer :
Option D is true.
Explanation:
We are given that a function f(x)=16 sin x
We have to find out which type of transformation or change to its parent graph.
We have parent function f(x)=sin x
Given function, f(x)= 16 sin x
If we are substituting

Then value of parent function

because

The value of given function
=16
Hence, the value of given function is 16 times the value of parent function.
Therefore, the given function contains vertical stretch or change in amplitude .
Option D is true.