Question

in routine problem solving, the number of external information sources used is typically multiple choice there is wide variation. none. a few. one. many.

Explanation:

In routine problem - solving, since the problems are familiar and have established procedures, people usually don't need to consult many external information sources. They might use a few to confirm or get some supplementary details, but "none" is too extreme (as sometimes basic references might be used), "one" is too restrictive, "many" is for non - routine or complex problems, and "wide variation" doesn't fit the typical case. So the most appropriate is "a few".

Answer:

C. a few (assuming the options are labeled A to E with A: There is wide variation, B: none, C: a few, D: one, E: many)