Final answer:
A grade 2 goiter indicates a palpable and possibly visible swelling of the thyroid gland, and a characteristic feature is that the goiter mass moves upward when a person swallows.
Step-by-step explanation:
The correct answer to the question "Which statement does the nurse know is true regarding a grade 2 goiter?" is (c) A goiter mass moves up while swallowing. A grade 2 goiter means that the swelling of the thyroid gland is palpable and may be visible when the neck is extended. Goiters are often associated with thyroid disorders such as iodine deficiency, Graves' disease, and Hashimoto's thyroiditis. When a person with a goiter swallows, the thyroid gland typically moves up due to its location just below the larynx and in front of the trachea. This movement with swallowing is a characteristic feature used in physical examination to confirm the presence of a goiter.