Web Analytics Tools Can Reveal Behavior Patterns About Consumers Based

Web analytics tools can reveal behavior patterns about consumers based on click paths throughout websites and have advanced segmentation and testing capabilities as well.However,there is a limit to how far web analytics can go because of their design.Which of the limitations below is the Achilles heel of web analytics tools?

A) Cannot include other channel data sources
B) Do not integrate with paid media
C) Can't report what happens between clicks