In the general case, how many test cases does a function need to pass in order to prove that it is correct? Select one: O a. 1 O b.5 O c. 10 O d. It depends on the number of lines of code in the function Oe. In general, it is not possible to prove that a function is correct In the context of testing, an equivalence class is: Select one: O a. A set of inputs that together provide broad testing coverage of a function O b. A set of numbers that are close together in value O cA set of inputs that are close to a boundary case O d. A set of numbers or strings that will reveal faults Oe. A set of inputs that are similar with regard to the properties of their expected outputs