The rule as a mapping for the translation of a triangle is (x,y)->(x,-2 y+7). Which describes this translation

A. A translation of 2 units down and 7 units to the right

B. A translation of 2 units to the right and 7 units to the left

C. A translation of 2 units down and 7 units to the left

D. A translation of 2 units to the left and 7 units up