Which of the following are valid Callable expressions? (Choose all that apply.)
C, E, G.
A Callable lambda expression takes no values and returns a generic type; therefore C, E, and G are correct.
A and F are incorrect because they both take an input parameter.
B is a Runnable lambda expression, because it does not return a value, but it is not a Callable one, so B is incorrect.
D is not a valid lambda expression, because it is missing a semicolon at the end of the return statement, which is required when inside braces {}.