What is printed as a result of executing the following code segment?

List list1=$1=$ new ArrayList()$()$;

list1.$1.$add("$("$a")$")$;

list1.$1.$add("$("$b")$")$;

list1.$1.$add(0,"$(0,"$c")$")$;

list1.$1.$add(1,"$(1,"$d")$")$;

list1.$1.$set(2,"$(2,"$e")$")$;

list1.$1.$add("$("$f")$")$;

System.out.println($($list1)$1)$;

What is printed as a result of executing the following code segment?

a.[$.[$c,$,$ a,$,$ e,$,$ d,$,$ b,$,$ f]$]$

b.[$.[$c,$,$ d,$,$ e,$,$ b]$]$

c.[$.[$c,$,$ d,$,$ e,$,$ a,$,$ b,$,$ f]$]$

d.[$.[$c,$,$ a,$,$ e,$,$ b,$,$ f]$]$

e.[$.[$c,$,$ d,$,$ e,$,$ b,$,$ f]$]$