Câu 13: 200-550: Zend Certified PHP Engineer

What is the output of the following code?class Base {protected static function whoami() {echo "Base ";}public static function whoareyou() {static::whoami();}}class A extends Base {public static function test() {Base::whoareyou();self::whoareyou();parent::whoareyou();A::whoareyou();static::whoareyou();}public static function whoami() {echo "A ";}}class B extends A {public static function whoami() {echo "B ";}}B::test();

1. A. B B B B B
2. B. Base A Base A B
3. C. Base B B A B — đáp án hiện tại
4. D. Base B A A B