一道初中英语阅读题Once a baby cries,the parents will go to see what h

一道初中英语阅读题
Once a baby cries,the parents will go to see what happened as soon as possible.According to a new study,a baby's cry can make adults react very quickly,even if they are not related.
Oxford University researchers used the classic game whack-a-mole for the study.Whack-a-mole(打鼹鼠) requires people to hit one of nine buttons.The players must react as quickly as they
can to whichever of the buttons lights up at random(随机).It is a game that requires speed and accuracy (准确度 ).
The study included 40 men and women volunteers aged 19 to 59.Some of them had sons or daughters but none had a baby at the time.They played whack-a-mole after listening to different sounds,including babies crying,the crying of adults in trouble and birdsong played at a similar pitch to the babies' cries.
The volunteers' scores were higher after listening to the sound of crying babies.Men and women had similar scores overall.The results showed that a crying baby gets special attention.
（后面的跟这题没什么关系,就不放了）
According to the passage,which of the following statements is TRUE?
A.There were 80 volunteers who took part in the study.
B.The youngest volunteer was 19 and the oldest was 59.
C.Some volunteers had babies at that time in the study.
D.The volunteers were affected by the sound of a baby's cry.
不过我觉得D也对.affect在牛津高阶英汉双解词典里的英文解释是to produce a change in sb/sth,没说一定是坏的影响.使人反应加快,那应该也算一种影响吧.
不知大家怎么看