Answer:
(4, 20) is correct because the dilation of T(2, 10) by a scale factor of 2 will give T'(4, 20).
Step-by-step explanation:
The coordinates of triangle TUV are T(2, 10), U(6, 2), and V(2, 2), if we dilate by a scale factor of 2, we'll have the below coordinates;

We can see from the above that the correct coordinate for T' is (4, 20).