The correct answer is: D. all of the mentioned
The .types attribute is used to specify the types of the input and output parameters of a function. The .type attribute is used to specify the type of a variable. The .class attribute is used to specify the class of an object.
When checking for type combination input and output, all of these attributes should be used. This is because the type of the input and output parameters of a function must match the type of the variable or object that is being passed to or returned from the function.
For example, if a function has an input parameter of type int, then the value that is passed to the function must be an integer. If a function has an output parameter of type string, then the value that is returned from the function must be a string.
If the type of the input or output parameter does not match the type of the variable or object that is being passed to or returned from the function, then an error will occur.