Step 1: Understanding the Question:
We must rank four nutrients by the amount a healthy adult needs every day, from the most to the least.
Step 2: Key Facts:
Carbohydrates are needed in the largest amount, around 50 to 60 percent of the energy, which is several hundred grams a day. Protein is needed in tens of grams a day (about 0.8 to 1 g per kg of body weight). Calcium is a macro mineral, needed in hundreds of milligrams (about 1000 mg a day). Iodine is a trace mineral, needed in micrograms (about 150 micrograms a day).
Step 3: Order the nutrients:
Carbohydrates (grams, largest) then protein (tens of grams) then calcium (1000 mg = 1 g) then iodine (0.15 mg). So the order is A, B, C, D.
Step 4: Check option (2):
This puts iodine before calcium. Iodine is needed in a much smaller amount than calcium, so it is wrong.
Step 5: Check option (3):
This puts protein before carbohydrates, and iodine before calcium. Both are wrong.
Step 6: Check option (4):
This starts with calcium, which is needed in much less amount than carbohydrates and protein. So it is wrong.
Final Answer:
The correct order is Carbohydrates, Protein, Calcium, Iodine. The answer is option 1.