52-year old avner's gfr was lower that of 20-year old avner and 52-year old avner's plasma creatinine concentration was higher than that of 20-year old avner.

having the certification could make the person more required to do a certain thing then another.this could also lead to different job offers or opportunities.

answer:

i believe the answer is d).

explanation:

i think this is because you are tearing apart the muscle, and then when you eat, the muscle re-heals, making itself even stronger.

edit: i put b) before but i meant to put d). sorry for the incorrect answer.

answer:

it could come from a variety of sources.

explanation:

..although it was most likely developed through zoonotic transmission, where an infectious disease which usually afflicts when animals jump to humans.