When Gov. Lawrence J. Hogan Jr. pulled the plug on the Red Line in 2015, he slammed the long-planned Baltimore project, calling it a “wasteful boondoggle.” The nearly $1 billion in federal funding that Maryland had secured to build the rail line was returned to the U.S. Treasury for use elsewhere. Seven years later, the Maryland Transit Administration has unveiled a new set of transit options that would serve the Baltimore region in similar ways. The agency hopes the public will study the options and offer comments.