EXIT_FAILURE and are named constants that may be used to indicate success or failure when the exit() function is called.

i guess the correct option is letter a.

use contrasting font sizes, but the same font style

answerstandard;

browsing like internet search? don't look at anything stupid. or set up restrictions on ur device's search engine. and if something suspicious comes up don't be dumb and click on it. i hope that's what ur question meant.