.option{ cursor:pointer;} 
.bold { font-weight:bold; } 
p .answer { clear:both; display: block; } 
.answer { margin-right:1em; font-weight:bold; } 
.answer+.explanation { display: none; }
.answer.correct { color:#6f793d; } 
.answer.correct+.explanation { display: block; }
.answer.wrong { color:#b31a18; }