ANSWER

Step-by-step explanation
We want to translate triangle ABC by 2 units right and 4 units down.
To do this, we have to add 2 to the x-coordinates and subtract 4 from the y-coordinates of the vertices of the triangle.
In other words, add 2 to each value in the first row and subtract 4 from each value in the second row.
That is:

That is the answer.