B. blind spot
The eye's blind spot is the part of the retina where the optic nerve exits.
They show which parts of the brain are involved in specific activities.
The answer is A. I don't think you need to know the chemistry of why they go together but I will tell you that uracil is only used in RNA which is why B is wrong. C and D just don't happen.
Answer:
Because the U.S. is rich in ECE deposits, these enthusiasts say, exploiting them is ... Both are certain that America's chief prospects for producing ... At the very top of the mine, a crusher reduced chunks of ore to pea-sized gravel. ... “It doesn't surprise me that we're the only ones looking at it right now.
Explanation: