求java高手帮助，这段代码的输出结果是？（字符串）

ckage ch;
public class Test03 {
public static void main(String[] args) {
String s1 = new String("-");
String s2 = "abc";
double a = 8.98;
if(s2.equals("Abc")){
s1 = s1 + ".e1";
}else{
s1 = s1 + ".e2";
}
if(s2.length() == 3){
s1 = s1 + ".e3";
}
if(a<=8){
s1=s1+".e4";
}
System.out.println("s1");
}
}
A.-.e4 B.-e1.e3 C.-e2.e3 D.-.e1
谢谢大家