The best and most correct answer among the choices provided by your question is the first choice or letter A. <span> An advantage of electron microscopes compared to light microscopes is that electron microscopes allow you to view living cells, while light microscopes do not.</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
The element that has a complete valence electron shell is argon(Ar) since it is a noble gas in the last group on the periodic table. destinymitchell966