To answer this question, let's go through each option to understand whether it will compile or not:
Option A) Faster f = Faster.Higher;
This option will not compile because the enum Faster is defined inside the class Better, so it cannot be accessed directly without specifying the class name.
Option B) Faster f = Better.Faster.Higher;
This option will not compile because the enum Faster is defined inside the class Better, and it cannot be accessed directly without specifying the class name.
Option C) Better.Faster f = Better.Faster.Higher;
This option will compile because it correctly specifies the enum Faster and assigns one of its values (Higher) to the variable f.
Option D) Bigger.Faster f = Bigger.Faster.Higher;
This option will not compile because the enum Faster is not defined inside the class Bigger. It is defined inside the class Better.
Option E) Better. Faster f2; f2 = Better.Faster.Longer;
This option will compile because it declares a variable f2 of type Better.Faster and assigns one of its values (Longer) to f2 in a separate statement.
Option F) Better b; b.Faster = f3; f3 = Better.Faster.Longer;
This option will not compile because it tries to assign a value to a non-existent variable b.Faster. Additionally, the variable f3 is not declared before it is used.
The correct answers are C and E. These options will compile as they correctly access the enum Faster and assign its values to variables.