Consider the following code segment.

$```$

String str$1=$ new String$("$Advanced Placement"$)$;

String str$2=$ new String$("$Advanced Placement"$)$;

if $($str$1.$equals$($str$2)$ && str$1==$ str$2)$

$\{$

System.out.println$("$A$")$;

$\}$

else if $($str$1.$equals$($str$2)$ && str$1!=$ str$2)$

$\{$

System.out.println$("$B$")$;

$\}$

else if $(!$str$1.$equals$($str$2)$ && str$1==$ str$2)$

$\{$

System.out.println$("$C$")$;

$\}$

else if $(!$str$1.$equals$($str$2)$ && str$1!=$ str$2)$

$\{$

System.out.println$("$D$")$;

$\}$

$```$

What, if anything, is printed when the code segment is executed?