Read the passage from a speech by President George W. Bush. We have other work to do on taxes. Unless Congress acts, most of the tax relief we've delivered over the past 7 years will be taken away. Some in Washington argue that letting tax relief expire is not a tax increase. Try explaining that to 116 million American taxpayers who would see their taxes rise by an average of $1,800. Others have said they would personally be happy to pay higher taxes. I welcome their enthusiasm. I'm pleased to report that the IRS accepts both checks and money orders. Which sentence from the passage is the main reason used to support the claim stated in the first sentence? “Unless Congress acts, most of the tax relief we've delivered over the past 7 years will be taken away.” “Some in Washington argue that letting tax relief expire is not a tax increase.” “Others have said they would personally be happy to pay higher taxes.” “I'm pleased to report that the IRS accepts both checks and money orders.”