△abc is reflected to form △a′b′c′ . the vertices of △abc are a(-1, 3) , b(2, 4) , and c(-5, 6) . the vertices of △a′b′c′ are a′(3, −1) , b′(4, 2) , and c′(6, −5) . which reflection results in the transformation of △abc to △a′b′c′ ? a. reflection across the x-axis b. reflection across the y-axis c. reflection across y = x d. reflection across y=−x