Optional arguments in a function are enclosed in a pair of ________

Which of the following are STL containers types?

a) Series Carton b) Associative containers c) Fraternal container d) Sequence containers e) Containers adapter f) Template classes g) Generic Template Collectives

When you assign a default value to a parameter, it then becomes a(n) ____.

A. named parameter B. static parameter C. method parameter D. optional parameter