What type of methods allow a client of a class to assign values to a private instance variable?

Which of the following would NOT be one of the tools mentioned to help manage large amounts of e-mail?

A) turning on an out-of-office notice B) filtering junk e-mail C) coding all messages with a blue flag D) presorting e-mail

The more twists in a twisted pair cable, the less __________________.

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