I would go for D...
We have to strengthen taxpayer XтАЩs argument in such a way that we take into conideration taxpayer YтАЩs reasoning too.
Choice D ...says that a campaign bill should be passed which will lengthen the Congress session...thus making the congress change its way when in session...or how it works(taxpayer YтАЩs argument).
Does the above reasoning make sense..?
"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"