____ is the most common method of certificate revocation.

Recursion will stop if there is a dove in the list, due to lines:

``` 1 bool search( Node ptr, Bird & bird, Bird dove ) 2 { 3 if ( ptr == NULL ) 4 return false; 5 if ( ptr->info == dove ) { 6 bird = ptr->info; 7 return true; 8 } 9 return search( ptr->next, bird, dove ); 10 } ``` which is called for a linked list (where start points to the first node) using the lines of code: ``` if ( search( start, bird, dove ) ) cout << “search successful” << endl; ``` A. 3-8 B. 5-8 C. 9 D. 3-4

All of C++'s higher-level I/O methods and streams are based on ____ methods.

A. other higher-level B. lower-level character C. character manipulation D. string manipulation