Hi engineeringworld,
for the first, you can add the following CSS to your theme’s style.css file.
.hdq_twitter {display: none !important;}
That will hide the twitter share from the results.
For the second, I’m afraid that both requests are not easy to do and there is no way to safely and accurately do it. However, the next version (to be realsed any day) is a BIG step in the right direction.
The next version will allow you to mark multiple answers as correct, although the user only needs to select one of them. Even though this is not what you need, it sets the ground work for the next evolution which is a new question type that is essentially “select all that apply” IE: the user has to select all of the correct answers in order for the question to be accepted as correct.