The epitaph of Mrs. Purkapile is part of Edgar Lee Masters' "Spoon River Anthology". It was published in 1915. This is a sequence of 245 free-verse epitaphs that are presented in the form of monologues. They are written from the point of view of deceased citizens of a small town.
The correct answer is option C: "And out of respect for my own character / I refused to be drawn into a divorce." These lines directly state the reason that Mrs. Purkapile had for staying married.