How do the authors develop the idea that paying patients for tissue could actually discourage people from donating discarded tissue or participating in medical research? use evidence from the text to support your response.

Millions of patients donate tissue altruistically for research, but doctors and researchers can’t know at the outset whose donation, if any, will end up making money. That’s not to say that there aren’t times when compensation is appropriate.

Most Americans are willing to donate samples of their body tissue for use in research, but their willingness drops when they're told about possible morally charged uses of their specimens, a new study finds hope this helps

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what are the phrases to choose from?