There are many factors to look for to determine a living organism. such as Nutrition, Reproduction, Sensitivity, Growth, Movement, Respiration, and Excretion.
TBut the most important that you can apply to all living organisms, even viruses are: Reproduction (it use the host to increase their number) and nutrition (it take energy from the host to replicate itself).
The answer is A:it does not have a plasma membrane. if you need proof https://www.bing.com/search?q=does%20a%20virus%20have%20a%20plasma%20membrane&qs=n&form=QBRE&sp=-1&p... i did a simple search
