-if it is a website, look for .gov.
-look for direct facts, never trust opinions.
-they must have cited evidence, if its not cited it can't be trusted.
A system is a group of organs that work together and provide an organism with an advantage for survival. It is the most complex organization in your body and the final level of the progression from cells to tissues to organs and then systems.
You could possibly experience some serious health problems or even worse possibly die but if you take care of yourself or go to the doctor with time you will have a better chance at surviving Corona
A is your answer I believe because they do indeed provide a way to review other scientists work and or experiments
