Apatient arrives at the hospital with severe pain from kidney stones. after testing, his urine is found to have a ph of 9.
what is true about the patient's urine sample?

acidic

Explanation:

A kidney stone can form when substances such as calcium, oxalate, cystine, or uric acid are at high levels in the urine. Stones can also form if these substances are at normal levels, especially if the amount of urine made each day is low. The substances form crystals, which become anchored in the kidney and gradually increase in size, forming a kidney stone.

Typically, the stone will move through the urinary tract (figure 1) and is passed out of the body in the urine. A stone may cause pain if it becomes stuck and blocks the flow of urine. Large stones do not always pass on their own and sometimes require a minimally invasive surgical procedure to remove them.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

c should be the answer