How do you switch on or off sections of a report or form?

For a macro shortcut key, which of the following is used before the letter?

A) CTRL B) Home C) SHIFT D) ALT

Which of the following strings contains balanced braces?

a) ab{cde{fg}hi{jkl} b) ab{cde{fghi}j}kl} c) {abc{de}{fg}hij}kl d) {ab{cde{fgh}ijkl}