"should students be paid for having good grades? "
pleas tell why

If you're asking for a personal opinion, I see why not.  Being paid for having good grades is almost identical to having a job.  Good performance results in being paid, while bad performance results in nothing.  In a way, students are paid for good grades already if you take into account the fact that one can earn a scholarship from having perfect performance.

the answer is c or the third one.

in the quotation from passage, connie willis states that literature is a way for authors from the past to communicate with readers of today. we can read their stories, books, and other texts to learn lessons about life. willis refers to these lessons as messages “from beyond the grave.” willis has a favorable viewpoint about the timelessness of literature.