A function that calls itself either directly or indirectly (i.e., through another function) is a(n) ________ function.

__________ programming is a form of design intended to ensure the continuing function of a piece of software despite unforeseeable usage of the software.

Fill in the blank(s) with the appropriate word(s).

A recursive function executes ____ its iterative counterpart.

A. more slowly than B. more quickly than C. at the same speed as D. proportionately to