Which of these is a result of ocean acidification

a. the ocean absorbs carbon dioxide
b. the amount of carbonic acid in searwater increases
c. carbonic acid strengths the exoskeletons of sea creatures
d. coral reefs experience record growth

I believe it is b- the amount of carbonic acid in seawater increases

I think the answer is b i'm not sure though 

A. mitochondrion b. nucleus

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.