To copy the angle ∠BAC, the correct construction procedure involves using a compass to measure the distance between points B and C, and then replicating this distance at point Q.
So, the best response is:
"Using a compass, measure the length from point B to point C. Then, make another arc by placing the pointed end of the compass on point Q and draw a small arc that intersects with the larger arc above point P."
This method ensures that the angle is copied accurately by maintaining the same angle measure as the original angle ∠BAC.