18. a is a pointer to a variable. Which answer below returns the data (or value) pointed to by a"? (i.e. which answer dereferences "a") A. a; B. val(a); C. *a; D. &a; 19. Which of the following functions can dynamically allocate memory in C? A. new B. malloc C. create D. value 20. Which of the following functions will deallocate memory in C (return dynamically allocated memory)? A. free B. delete C. clear D. remove 21. Which of the following accesses variable "var in a structure named b? (b is a structure, not a pointer to a structure) A. b->var; B. b.var; C. b-var; D. b>var