Final answer:
The nurse should advise the client to include almonds in their diet as they contain the highest amount of calcium among the listed options, which is vital after the removal of the parathyroid glands.
Step-by-step explanation:
The nurse should instruct the client who had a thyroidectomy with removal of the parathyroid glands to include foods high in calcium in her diet. Among the options given, almonds contain the greatest amount of calcium. Therefore, the correct answer is D. Almonds. Calcium is especially important in this case because the removal of the parathyroid glands can result in hypocalcemia, a condition characterized by low levels of calcium in the blood. Almonds, alongside other non-dairy sources such as green leafy vegetables and fortified foods, can help maintain adequate calcium levels in the body.