After clicking End Review you still need to save the presentation to keep the accepted revisions

The parentheses around the two rightmost occurrences of x in the following preprocessor directive:

#define CIRCLE_AREA(x) ((PI) * (x) * (x)) a) are always required. b) are included to improve program readabiliy. c) are included to eliminate bugs when an expression is substituted for x. d) should be curly braces { }.

The vi command Ctrl g

a: places the cursor at the end of the file b: places the cursor at the top of the file c: cancels last changes on the current line d: scrolls the cursor down one page e: displays the line number of the current line