Sometimes a test can be incorrect or their signs haven't shown up yet, a follow up Is made so that there can be definite results
Answer:
microscopes were invented
Explanation:
may i have brainliest??
The answer is probably B but C is also technically correct however that function is less important than to give the body oxygen.
Distolic number less than 90 mm Hg and a systolic greater than 140 mm Hg is hypertension