Which regular expression, inserted at line 12, correctly splits test into "Test A", "Test B", and "Test C"?()<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080115403468417.jpg?sign=d818d972184a38b22f14d34af569f633&t=62d4b529" />
A、String regex = "";
B、String regex = " ";
C、String regex = ".*";
D、String regex = "\\s";
E、String regex = "\\.\\s*";
F、String regex = "\\w[\.] +";