單項選擇題視距測量時,經(jīng)緯儀置于高程為162.382m的A點,儀器高為1.40m,上、中、下三絲讀數(shù)分別為1.019m、1.400m和1.781m,求得豎直角a=3°12’10",則AB的水平距離和B點的高程分別為:()

A.75.962m,158.131m
B.75.962m,166.633m
C.76.081m,158.125m
D.76.081m,166.633m