The correct answer is: C. C-Class.
An overlapping section is a section of a class that is also present in another class. For example, if a class has two sections, A and B, and section A is also present in class C, then section A is an overlapping section.
Option A: A-Class. This is not the correct answer because an overlapping section is a section of a class that is also present in another class. Option A does not meet this criteria because it is not a section of a class.
Option B: B-Class. This is not the correct answer because an overlapping section is a section of a class that is also present in another class. Option B does not meet this criteria because it is not a section of a class.
Option C: C-Class. This is the correct answer because an overlapping section is a section of a class that is also present in another class. Option C meets this criteria because it is a section of class C and it is also present in class A.
Option D: D-Class. This is not the correct answer because an overlapping section is a section of a class that is also present in another class. Option D does not meet this criteria because it is not a section of a class.