单项选择题

则f(-x)=(    )
   A.    B.
   C.    D.

A.174.24.96:6088/Latex/latex.action?latex=Zih4KT1cbGVmdFx7XGJlZ2lue2FycmF5fXtjfXheezJ9LHjiiaQwXFwgeF57Mn0reCx477yeMCAg%0D%0AXGVuZHthcnJheX0%3D'
B.C.174.24.96:6088/Latex/latex.action?latex=XGxlZnRce1xiZWdpbnthcnJheX17Y30teF57Mn0seOKJpDBcXC0oeF57Mn0reCkseO%2B8njAgIFxl%0D%0AbmR7YXJyYXl9'
D.E.174.24.96:6088/Latex/latex.action?latex=XGxlZnRce1xiZWdpbnthcnJheX17Y30tKHheezJ9K3gpLHjvvJwwXFwteF57Mn0seOKJpTAgIFxl%0D%0AbmR7YXJyYXl9'
F.G.174.24.96:6088/Latex/latex.action?latex=XGxlZnRce1xiZWdpbnthcnJheX17Y314XnsyfSx44omkMFxcIHheezJ9LXgseO%2B8njAgIFxlbmR7%0D%0AYXJyYXl9'
H.I.174.24.96:6088/Latex/latex.action?latex=XGxlZnRce1xiZWdpbnthcnJheX17Y314XnsyfS14LHjvvJwwXFwgeF57Mn0seOKJpTAgIFxlbmR7%0D%0AYXJyYXl9'
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