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Regulators versus conformers

Google Classroom

While marine invertebrates like jellyfish are classified as osmoconformers, marine mammals like dolphins are called osmoregulators.

Which statement correctly describes how dolphins respond to salinity in their environment?

(Choice A)
Vertebrates like dolphins are unaffected by salinity.
(Choice B)
Dolphins regulate their body temperatures in response to salinity.
(Choice C)
Dolphins use excretory organs to maintain constant osmolarity by getting rid of excess salts.
(Choice D)
Dolphins use excretory organs to maintain constant osmolarity of the surrounding water.