The correct option is
C Development and formation of spores
Sporogenesis is the formation of spores. Formation of microspores is called microsporogenesis and formation of megaspores is called megasporogenesis. Microspores are formed in the anther and develop into pollen grains whereas megaspores are formed inside the ovule and develop into embryo sac. Thus, sporogenesis involves the formation and development of spores.
So, the correct answer is A.