Hippocrates improved the practice of medicine by: A. Encouraging collaboration of ideas between doctors.
B. Advocating a sound diet and good hygiene.
C. All of the Above

C

Explanation:

According to Hippocrates, the diagnosis and treatment of mental and physical diseases are based on observation, consideration of the causes, balance of theory, and on the four liquids, blood, phlegm, yellow bile and black bile Advocating a sound diet and good hygiene.

Collecting descriptions of symptoms of various illnesses .

the answer is states.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.