The correct answer is A.
The official guidelines from doctors state that infants should start consuming solid food after the age of six months. In order for the infants to be safe and healthy, they need to be able to sit up, support their back and chew safely before being given solid food.
Binary fission is Asexual. It has a process where it involves splitting the DNA of a parent cell creating two daughter cells. Conjugation is a sexual reproduction. It involves the direct transfer of genetic material between two bacterial cells.
Sorry if I'm wrong but if I'm correct its pupa