Fact 1: Darkness has a negative impact on photosynthesis. Fact 2: Light is necessary for photosynthesis, a process that produces oxygen. Given the two facts above, darkness has a negative impact on which process of a plant?

Select from:
(I) slow and inefficient
(II) chemical changes
(III) circulatory systems
(IV) most organisms
(V) fossil fuels
(VI) Abnormal cell growth
(VII) deoxyribonucleic acid
(VIII) Oxygen production
The answer is:
(VIII)