Chris Harrison has handed out his final rose! The former Bachelor Nation host proposed to ET's Lauren Zima over the weekend in Napa Valley, California. «I love you @laurenzima The next chapter starts now!» Harrison captioned a photo of the proposal, featuring him down on one knee with a stunning backdrop. A post shared by Chris Harrison (@chrisbharrison)Zima also posted two photos from the proposal, including one of the couple toasting their engagement that showed off her stunning sparkler. «We