To answer this question, let's go through each option:
Option A) final - This option is valid on line 12. The "final" keyword is used to indicate that a variable's value cannot be changed once it has been assigned a value. In this case, the variable "MY_VALUE" is assigned the value 10, and since it is declared as "final", its value cannot be changed.
Option B) native - This option is not valid on line 12. The "native" keyword is used in the declaration of a method to indicate that the method's implementation will be provided by a native code, typically written in a language like C or C++. It is not applicable to variables.
Option C) abstract - This option is not valid on line 12. The "abstract" keyword is used to indicate that a class or method does not have an implementation and must be overridden by a subclass. It is not applicable to variables.
Option D) protected - This option is not valid on line 12. The "protected" keyword is used to specify that a member (variable or method) can only be accessed within its own package or by a subclass of its class. It is not applicable to variables.
Therefore, the three valid options on line 12 are A) final, C) and F) abstract.