A.
Explanation: Because he learned it in previous years when it was different, now it becomes hard to learn the new information.
The correct answer is A. This is because undeveloped meaning they don't have access to any of the other offered answers
<span>Factors that affect 'neurotransmission' are plentiful, but the most common include genetics, eating habits, exposure to chemicals, and in the case of humans, stress.</span><span>
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Answer: D. sixty
Explanation: the answer is 60 or sixty
Developing Nations currently produce about 2600 kcal of food per person per day. The growth in food consumption around the world has been accompanied by a significant structural changes and a shift in the diet away from the staple foods such as roots and tubers towards more livestock products and vegetable oils.