What is wrong with it?

Line 1 public class AttributeTypes

Line 2 {

Line 3 private final String[] arrayItems;

Line 4

Line 5 @AuraEnabled

Line 6 public List<String> getStringArray() {

Line 7 Strings+ arrayItems = new String*+, ‘red’, ‘green’, ‘blue’ -;

Line 8 return arrayItems;

Line 9 }

Line 10 }

Consider the Apex controller above that is called from a Lightning Aura Component .

What is wrong with it?
A . Line 1: class must be global
B . Lines 1 and 6: class and method must be global
C . Line 6: method must be static
D . Line 8: method must first serialize the list to JSON before returning