Which dss principle determines solutions or alternate actions in precision farming

When multiple data streams are collected, one must decide how those data will be fused in the decision process. Separate data streams can be:

Mixed mode (including both quantitative and qualitative data).
Redundant (validating the data from another stream).
Complementary (providing measures of multiple characteristics of an object).
Supportive (helping verify some interpretation of another data stream).

The answer is c. valence electrons