What is the difference between struct and class in C++?

• A. All members of a structure are public and structures don’t have constructors and destructors
• B. Members of a class are private by default and members of struct are public by default. When deriving a struct from a class/struct, default access-specifier for a base class/struct is public and when deriving a class, default access specifier is private.
• C. All members of a structure are public and structures don’t have virtual functions
• D. All of the above