Answer: Because they have built up immunity from past medications.
Explanation: As people get sick and are given antibiotics the 99.9 % are removed but that one percent from the bacteria is able to overcome the antibiotics and make itself stronger and immune to the medicines, then the bacteria evolves and a new person will get infected and will need stronger antibiotics further more the cycle is repeated.
In the Nature v. Nurture debate, scientists who argue that personality
is established by our genetics believe that the transmission of these traits is
a result of hereditary. The answer is letter B. Hereditary characters
can be obtained from the parent genes during sexual intercourse. It is
contained in the offsprings’ DNA.
