Use document ________ to position a text box in a document

Rewrite the following while loops as for loops:

a) int i = 1; while(i<=10) { if (i<5 && i !=2) cout << 'X'; i++; } b) int i =1; while(i<=10) { cout << 'X'; i = i + 3; } c) int n = 100; do { cout << 'X'; n = n + 100; }while(n < 1000);

____ automates the download and installation of Ruby on Rails programs and related development software tools.

A. RubyInstaller B. Gems C. RubyGems D. RubyMgr