The development of factored in the development of complex organisms.
a. ozone
c. cyanobacteria
b. oxygen
d. all of the above

Answer;

-All the above

-Ozone, Cyanobacteria, oxygen

The development of ozone, oxygen, and cyanobacteria factored in the development of complex organisms.

Explanation;

-Oxygen played a key role in the evolution of complex organisms. Life forms became even more complex following the evolution of organelles able to produce oxygen.

-The emergence and expansion of complex eukaryotic life on Earth is linked at a basic level to the secular evolution of surface oxygen levels. Cyanobacteria conducted photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. In fact, all the plants on Earth incorporate symbiotic cyanobacteria (known as chloroplasts) to do their photosynthesis for them down to this day.