Which of the following kinds of organisms do photosynthesis? Select all that apply.

Plants, algae, cyanobacteria, and etc.

Explanation:

"Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth."

it has one origin of replication, but it proceeds in two directions - d)

looks like the answer is     c     to me!