CORALVILLE — Grundy Center had one more answer with its season on the line.Trailing Beckman Catholic two sets to one in Wednesday’s Class 2A state volleyball semifinal, the Spartans won the fourth 25-18 to force a deciding fifth set. A day after surviving a five-set quarterfinal against Aplington-Parkersburg, Grundy Center again took its opponent the distance at Xtream Arena.This time, Beckman finished the match. The Trailblazers won the fifth s…