In preparation for mining an analyst should:

A. explore the relationships between variables.
B. verify completeness and accuracy of the data.
C. clean the data addressing missing values, errors, etc.
D. All of the above.

Which one of the following is the most accurate definition of technology? a electronic tools that improve functionality b electronic tools that provide entertainment or practical value c any type of tool that serves a practical function d any type of tool that enhances communication