单项选择题

From this passage, we can conclude that______.

A．education is beneficial to mental development
B．education protects the brain from shrinking
C．education has a protective effect against mental decline
D．education affects overall brain structures

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单项选择题According to Coffey' s research, the brain may benefit from______.

A．running
B．playing chess
C．swimming
D．playing football

单项选择题Which of the following statements is tree

A．The brain of an adult person shrinks 2.5% every 10 years.
B．The cerebrospinal fluid of a person with 8 years of education may have increased 17.7 milliliters.
C．The cerebrospinal fluid of a person with 16 years of education may increase by 10%.
D．The brain of an aged person shrinks 5% every 10 years.