Question

what is the most primitive method of cell division? binary fission fragmentation mutation meiosis

Explanation:

Binary fission is the simplest, most primitive cell division method, used by prokaryotes (the earliest life forms) to split one cell into two identical daughter cells. Fragmentation is a form of asexual reproduction for multicellular organisms, mutation is a genetic change, and meiosis is a complex sexual division for eukaryotes.

Answer:

A. binary fission