Rising college costs have pushed America's student loan debt over the $1 trillion mark for the first time. That's just one sign of the challenges that students and parents face as they navigate a sea of how-to-pay complexities. The rewards of earning a degree remain as high as ever, some economists say. But the risks of going into too much debt are also high. Can you make the college-finance "honor roll"? Here's a quiz designed to test your knowledge ... and expand it.  See: http://www.csmonitor.com/USA/Education/2012/0427/Student-loans-and-college-finance-Take-our-quiz/Share-of-students-who-borrow