<span>A. Keynote address
In the Keynote address is most likely a world-famous surgeon would give his/her speech in order to motivate, inspire and challenge pursing scientists and medical professionals in their pursuit of their successful career and the like endeavors. </span>
The color red can indicate a positive result
I think the answer is Endospore. I'm sorry if I'm wrong...
About 330,000<span> times larger</span>