1. A function type is defined by the a. arguments passed to the function b. parameters declared in the function header c. function's return type. 2. An argument passed to a function can a. only be a constant b. only be a variable c. be any expression of the expected argument type 3. If a function d oes not expect an argument, the function's prototype can be declared without braces following the function's name. b. a. with braces that contain nothing. To make the identifiers of the std namespace globally available in your program, you can add the directive a. #using namespace std; b. using