While Eating Lobster for Dinner One Night Your Friend Asks

While eating lobster for dinner one night your friend asks what you think might happen if this marine invertebrate, which is normally isosmotic with respect to the surrounding seawater, were to be moved to a bay with a slightly lower salt concentration instead of being caught. You reply that, in order for the lobster to be isosmotic with respect to new environment, it

A) must move water in to match the solute concentration of its new environment.
B) regulates its internal concentration of solutes to match that of its new environment.
C) must move water out to match the solute concentration of its new environment.
D) moves water in or out and regulates its internal concentration of water as needed.