Regarding "Marketing Research" and "Marketing Information Systems

Regarding "marketing research" and "marketing information systems":

A) marketing information systems gather and analyze data from sources inside the company, while marketing research handles all external sources.
B) marketing information systems make information more available and more accessible.
C) marketing information systems tend to increase the quantity of information available for decision making, but with some decrease in quality.
D) most firms have gone "too far" trying to apply modern decision-making techniques.
E) All of the above are true.