Answer:
I would say it is A
Explanation:
I mean if you think about it, no one really knows how science is going to work. It is different each time.
The Light Reactions Provide Energy Carriers For The Dark Reactions.
In general, coding regions are more likely to have the same sequence. It is more likely to produce a non-functional gene product (protein).
Non-coding mutations are free to mutate because it has no protein product, and are less likely to affect phenotype. They are neutral mutations. Different mutations can be differentiated even when different groups have the same coding sequence.
Increased carbon dioxide levels
This is because the plant takes in Carbon Dioxide to use it's carbons to help make energy. So if there is more carbon dioxide, there is more photosynthesis going on in the plant since carbon is also in the sugar the plant uses.