单选题

<?php $age=array("Bill"=>"35","Steve"=>"37","Peter"=>"43"); echo "Peter is " . $age['Peter'] . " years old."; 上述事例执行后的结果输出为（ ）

Question

A. Peter is 43 years old.

B. Peter is . 43 .years old.

C. Peter is

D. years old.