It can be inferred that non-human primates ______.
A.
are mostly left-handed
B.
are mostly right-handed
C.
are equally divided between right-handers and left-handers
D.
are good at using both hands
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【单选题】The men who had seven or more siblings had more than ______ the risk of developing stomach cancer, compared to men with the same H. pylori strains who had one to three siblings.