In C++17, what is the purpose of the standard library templates std::enable_if and std::enable_if_t? Pick ONE option O C O O To induce compile-time errors if certain expressions do not evaluate to true To remove function template instantiations from an overload set if certain requirements related to the types used for the instantiation are not met To conditionally include member variables in a class or struct To query platform-dependent information (e.g. the compiler version) to conditionally compile certain segments of code To prevent templated classes/structs from being instantiated with certain arguments

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C++ please make simple

need help in C++ Problem: You are asked to create a program for storing the catalog of movies at a DVD store using functions, files, and user-defined structures. The program should let the user read the movie through the file, add, remove, and output movies to the file. For this assignment, you must store the information about the movies in the catalog using a single vector. The vector's data type is a user-defined structure that you must define on functions.h following these rules: Identifier for the user-define structure: movie. Member variables of the structure "movie": name (string), year (int), and genre (string). Note: you must use the identifiers presented before when defining the user-defined structure. Your solution will NOT pass the unit test cases if you do not follow the instructions presented above. The main function is provided (you need to modify the code of the main function to call the user-defined functions described below). The following user-defined functions are…