Which of the Following Statements About Formal and Informal Research

Multiple Choice

Which of the following statements about formal and informal research is least accurate? 

A) Long reports and complex business problems generally require some use of formal research.
B) When you work on a business report, avoid using the Web for research because much of what is available on the Web isn't credible.
C) Most routine writing tasks require data that you can collect informally.
D) Some routine writing tasks will require no research at all.