MIAMI--(BUSINESS WIRE)--Carnival Cruise Line, the world's largest cruise operator, has appointed SapientNitro, part of Publicis.Sapient, as the cruise line’s lead digital experience agency. The multi-year agreement will focus on the development and execution of the company’s digital strategy and digital transformation efforts. “In today’s digital age, the vacation experience often begins online,” said Christine Esteve, vice president of e-commerce at Carnival Cruise Line. “We selected SapientNi