△abc is reflected to form △a′b′c′ . the vertices of △abc are a(−7, 1) , b(−5, −3) , and c(−3, 2) . the vertices of △a′b′c′ are a′(−7, −1) , b′(−5, 3) , and c′(−3, −2) . 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