Enova Corp. and Pacific Enterprises told state...

Enova Corp. and Pacific Enterprises told state regulators that opponents to their merger seek to thwart competition in the energy marketplace rather than enhance it. . . . PacifiCare Health Systems Inc.’s $2.1-billion acquisition of FHP International Corp. will be delayed by a Federal Trade Commission antitrust review, PacifiCare said. The purchase, which had been scheduled to close in early January, is expected to be completed later in the month, it said. . . . WorldCom Inc.’s $12.1-billion acquisition of MFS Communications Co. was approved by both companies’ shareholders, MFS said. . . . Rhone-Poulenc Rorer Inc. said it won approval from the Food and Drug Administration to sell its new antibiotic Zagam. . . . ITT Barton, a city of Industry-based unit of ITT Industries Inc., agreed to pay the government $262,500 to settle allegations it failed to perform required tests on Navy submarine equipment, the Justice Department said.