String $s=$ "abcdefg";

char$[]arr=\{x^{\text{'}},{?}^{\text{'}}{x}^{\text{'}},{?}^{\text{'}\text{'}}{x}^{\text{'}},x^{\text{'}}\}$;

Given the above declarations. What is the content of arr after the following statement executes?

s$.$getChars $(0,3,$arr,$1)$

${\{}^{\text{'}}{x}^{\text{'}},{?}^{\text{'}}{x}^{\text{'}},{?}^{\text{'}}{x}^{\text{'}},{?}^{\text{'}}{x}^{\text{'}}\}$

$\text{'}$x$\text{'},\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}$c$\text{'}\}$

${\{}^{\text{'}}{a}^{\text{'}},{?}^{\text{'}}{b}^{\text{'}},{?}^{\text{'}}{c}^{\text{'}},{?}^{\text{'}}{x}^{\text{'}}\}$

${\{}^{\text{'}}{a}^{\text{'}},{?}^{\text{'}}{b}^{\text{'}},{?}^{\text{'}}{c}^{\text{'}},{?}^{\text{'}}{d}^{\text{'}}\}$