Because it leaves almost no trace and no symptoms yet can still kill you very quickly and effectively
The captain of our football team was benevolent and had an avid interest for the game. Unlike other captains, he was not arrogant. He had an aspiration to not only win the championship but to help everybody in the team acquire the skills to make us better.
I am going to stick with D.
It is very important to support your thesis statement with evidence.