The most common mode of reproduction in bacteria is

• Reproduction allows for the species' durability, down the generations. It consists of two types asexual and sexual reduplication, grounded on whether one or two individualities are involved in the reproductive process. 
•  Among single- celled species, and in shops and creatures with fairly simple organisations, asexual reduplication is common. double fission is a form of asexual reduplication used by members of the archaea and bacteria. It results in cell division of the parent cell to produce two feasible cells that can replicate the process. 
•  Expiring is a type of asexual reduplication in which small kids are formed in the parent cell that gradationally resolve and develop into new species. This type of reduplication is seen in incentive. 
•  Sexual reduplication involves the conformation and emulsion of gametes. In discrepancy to asexual reduplication, it's a complicated and slower process. numerous of the advanced creatures reproduce by sexual system nearly entirely. 
• The members of Kingdom Fungi and simple organisms like algae reproduce through special asexual reproductive structures. These structures are generally bitsy motile structures called zoospores.

Hence, option A is the correct answer.