If a student fails to recognize how to properly quote the words of an arthur that student may be found guilty of

Which sentence is punctuated correctly? a) the moon which often shines too brightly in my window is full tonight. b) my new textbook which costs over thirty dollars is the best one i've ever read. c) mr. smith, who is a well-respected lawyer, has just retired from active practice. d) the play by velma winterbaker, that was published last year, ended up winning the pulitzer prize. '