单选题

下列语句存在语法错误的是（ ...

Question

下列语句存在语法错误的是（      ）

A. var a []int a = append(a, 9)

B. var m map[string]int m[&ldquoa&rdquo]=5

C. var m map[string]int m=make(map[string]int) m[&ldquoa&rdquo]=5

D. var a = [][2]int{{0, 0}, {1, 2}, {2}, {3, 6}, {4, 8}}