Select the correct answer. You reflect triangle PQR, with vertices P(-2, -4), Q(-3, -1), and R(-4, -4), across the y-axis to get triangle P′Q′R′. What are the coordinates of triangle P′Q′R′??
A. P′(-2, 4), Q′(-3, 1), R′(-4, 4)
B. P′(2, -4), Q′(3, -1), R′(4, 4)
C. P′(-2, 4), Q′(-3, 1), R′(4, -4)
D. P′(2, -4), Q′(3, -1), R′(4, -4)