If a class A contains an instance variable whose type is class B, you say that B has an A.

A __________ is an attack based on weaknesses in a particular cryptographic algorithm.

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

If you plan to add content in a repeating region within the pages created from the template, you must add a(n) ____ region within the repeating region.

A. editable B. noneditable C. optional D. variable