Ruth, a 58-year-old taxpayer, has a self-only health savings account (HSA) and was enrolled in a high-deductible health plan (HDHP) during 2017. Ruth's employer made a $1,000 contribution to her HSA. If Ruth chooses to make an additional contribution for the tax year, what is the maximum amount she may contribute? *

	$1,000
	$2,400
	$3,400
	$4,400