Answer: A. A bacterium splits into two separate organisms.
The asexual reproduction is a process that does not involve meiosis and occurs when the offspring arises from a single organism. Thus, it inherits the genes coming only from one individual.
All bacteria reproduce asexually as the original individual splits into two "offspring" cells. Due to this, they are able to reproduce extremely fast, and harmful genetic mutations are inconsequential to the whole population. It is enough for only a few individuals to survive in order for the population to recover quickly.