Why Are Laws Passed by Congress Often Not Far from the Status

Why are laws passed by Congress often not far from the status quo?

A) Broad support needed to pass legislation generates moderate legislation.
B) All representatives are close to the center of the ideological distribution.
C) Presidents favor the status quo and will only sign bills close to it.
D) The Supreme Court will strike down extreme legislation.
E) Most laws passed by Congress are far from the status quo.