(April 11, 2016, 5:18 PM EDT) -- WASHINGTON, D.C. — A Fifth Circuit U.S. Court of Appeals decision affirming a federal district court’s ruling that denied a motion for class certification in a securities class action lawsuit was correct and was not in conflict with any ruling of the U.S. Supreme Court or any other federal court of appeals, defendant BP PLC argues in a March 30 opposition brief filed in the U.S. Supreme Court (Robert Ludlow, et al. v. BP PLC, No. 15-952, U.S. Sup.; 2016 U.S. S. Ct. Briefs LEXIS 1432)....