<span>. D) divided European countries into two groups- communist and non-communist.</span>
These subjects were considered to be the impuriest of the impure according to the Nazis, this goes back to the idea of the survival of the fittest. These subjects weren’t fit and had little chance of survival as it was already.
Sad topic, but one that should never be forgotten, hope this helps, God bless, and have a great day.
Brainliest is always appreciated :)
It allows memory b cells to remember the virus and that makes the virus completely immune. So, if there were a real situation in which the individual got the real form of the virus, then the immune system would act quickly in neutralizing the situation; hence, why vaccines are very important.