A team of scientists is working to formulate a drug that can treat children who are diagnosed with gigantism. Which effect should the drug have on patients?

Gigantism usually results from excessive growth hormone, which is secreted by the pituitary gland. A drug to treat it should reduce the secretion of growth-promoting substances from that gland. Therefore, the correct choice is D, decreases the secretion of substances from the pituitary gland that cause growth.

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