People with bigger brains tend to score higher on standardized tests of intelligence, acco

People with bigger brains tend to score higher on standardized tests of intelligence, according to new study findings.
However, Dr. Michael A.McDaniel emphasized that these findings represent a general trend, and people with small heads should not automatically believe they are less intelligent. For instance, Albert Einstein’s brain was “ not particularly large,” McDaniel noted “ There’s some relationship between brain size and intelligence on average, but there’s plenty of room for exceptions,” he said.
Interest in the relationship between brain size and intelligence grew in the 1830s, when German anantomist(解剖学家)Frederick Tidemann wrote that he believed there was “ a natural connection between the size of the brain and the mental energy displayed by the individual man.” Since that statement, scientists have conducted numerous studies to determine if Tidemann’s idea was , in fact, correct. Most studies have investigated the link between head size and intelligence .More recently, however, researchers have published additional studies on intelligence and brain size, measure using MRI scans.
For his study, McDaniel analyzed more than 20 studies that investigated the relationship between brain size and intelligence in a total of 1,530 people. The studies showed that on average, people with larger brain volume tended to be more intelligent. The relationship was stronger in women that men, and adults than children ,McDaniel noted.
In an interview, McDaniel noted that he’s not sure why the relationship was stronger for adults and women. Previous research has shown that women, on average, tend to have smaller brains that men, but score just as well--- if not higher--- in tests of intelligence he said.
McDaniel insisted that the relationship between brain size and intelligence is not a “perfect” one. “One can certainly find lots of examples of smaller-brained people who are highly intelligent,” he said” But , on average, the relationship holds.”
73．What does the passage mainly tell us?
A．The success of using MRI scans for studies on man’s intelligence.
B．On average bigger brains mean higher IQ.
C．The importance of our brain volume.
D．Dr. Michael succeeded in his studies on man’s intelligence.
74．By mentioning Albert Einstein, the writer wanted to show .
A．what Albert Einstein achieved had nothing to do with his brain size
B．probably the studies on man’s intelligence are not worth believing
C．why hard working is more important than intelligence.
D．the results of these studies are not true for everyone
75．The underlined word “investigated “ could be replaced by .
A．worked our B．guessed C．study D．imaginedB

(答案→)B 解析：

这个答案应该是对的