Question

(9) scientists have been stumped by this process. (10) but in 2012 scientists found that the brain has its own type of lymphatic system. (11) dr. maiken nedergaard and her team of researchers were surprised and excited to discover the first evidence of a tightly interwoven system that rapidly removes waste from the brain. (12) the brains blood vessels have fluid that is running along the side of them, the team determined, and this fluid is what is carrying waste away from the brain. (13) however, unlike the lymphatic system - which operates on a slow, continuous basis - this newly discovered system operates only when a person is asleep, washing away waste by flooding the brain quickly with fluid. (14) now you have one more reason to get a good nights sleep. (15) it took three more years for scientists to discover the specific vessels in the brain that are part of this lymphatic system. (16) in 2015, researchers were able to provide proof of a lymphatic system in the brain when they actually managed to see the vessels that are used to flood the brain and 12. reese wants to improve the clarity of sentence 12. how should sentence 12 be revised? running along the brains blood vessels, the team determined a fluid that carries waste away from the brain. the team determined that fluid running along the brains blood vessels carries waste away from the brain. waste by a fluid that is running along the brains blood

Explanation:

The original sentence has a convoluted structure. The revised option "The team determined that fluid running along the brain's blood vessels carries waste away from the brain" clearly states who made the determination and what the determination is about in a more straightforward manner.

Answer:

The team determined that fluid running along the brain's blood vessels carries waste away from the brain.