This is really hard and i don't get it you all

The best explanation is B, there used to be salt water. A is unreasonable and unrealistic as sharks and all fishes, excluding dolphins and sometimes whales (if they count as air breathing mammals) can not survive in air for a very long time. C, I think sharks can't survive in fresh water as they can in salt water. D is not very accurate as some people have died from getting a shark attack and getting a shark's tooth is probably a death wish. Hence, B is very accurate as even where I lived, there used to be an ocean.

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.