What type of attack is being conducted when the attacker has messages in both encrypted form and decrypted forms?

Which of the following statements are true?

A. Recursive functions run faster than non-recursive functions. B. Recursive functions usually takes more memory space than non-recursive functions. C. In some cases, however, using recursion enables you to give a natural, straightforward, simple solution to a program that would otherwise be difficult to solve. D. A recursive function can always be replaced by a non-recursive function.

The default value of the vertical-align property positions the text at the ____ of the cell.

A. middle B. base C. top D. bottom