问答题

What does the author mean by 'House Republicans have threatened to roll them back' (Line 2, Para. 5) ?
A.House Republicans want to make the rules move forward.
B.House Republicans require more support to the rules.
C.House Republicans threaten to replace the rules with a new one.
D.House Republicans declare to end the rules gradually.

A.House
B.
B.House
C.
C.House
D.
D.House
E.
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