To paraphrase Roger Tomlinson, one of the fathers of GIS in the 1960s, "You've got to know what you want to get out of a GIS in order to know what to put into it. From the list below, mark all those answers that fit well with Tomlinson's remark. Select one or more:

Group of answer choices

a. Start with the final result you have in mind and work backwards.

b. Have a clear idea of what you want to produce, explain, or monitor.

c. Entice users of all levels to drill in, explore, interrogate, and learn.

d. Get some random data, and just click aimlessly in the mapping tool.

e. Come up with a specific question to work toward.