If the email will be read in a mobile device then I would keep it very short, so that it can be desplayed on one screen, without scrolling. How about this then:
Dear Supervisor,
I just wanted to update you on my training. This week, we have practiced on pacients, and specifically, we practiced explaining to patients the procedures, exchanging stitches and cleaning the wounds. I believe that this is very important experience for my career!
All the best,
your trainee
None of the above may be the correct answer because none of them is the correct answer
B. Advocacy because theres no research and evidence