QUESTION 9 What is a higher-order function? O a. A function that does I/O. b. A function that sorts a list in ascending order. O c. A function that acts on functions. d. A function that does not attempt to modify immutable values. e. A function that deals with data structures, not simple values. Of. A function that has no side effects. QUESTION 10 What is a pure functional programming language? a. A PL in which everything is a function. O b. A PL in which all the parameters of a function must have the same type. c. A PL in which type safety is strictly enforced. O d. A PL that does not allow type annotations. e. A functional PL that does not support other programming styles, such as OOP. Of. A PL without mutable data or side effects