When the CEO summoned a group of senior marketing managers to study competitor's practices, the managers found that the difficulties were more serious than
they imagined it to be and the competitor had made huge investments in a survey to gather, integrate, and to analyze data from each store and every sales unit and had run a multitude of experiments.
A.) they imagined it to be and the competitor had made huge investments in a survey to gather, integrate, and to analyze data from each store and every sales unit
B.) they imagined and that the competitor had made huge investments in a survey to gather, integrate, and analyze data from each store and every sales unit
C.) they had imagined and the competitor made huge investments in a survey to gather, integrate, and analyze data from each store and every sales unit
D.) they imagined and that the competitor made huge investments in a survey to gather, integrate, and to analyze data from each store and every sales unit
E.) they had imagined and that the competitor had made huge investments in a survey to gather, integrate, and analyze data from each store and every sales unit