Discussion
How many envioronmental attributes were used to display the relationships in a cross-impact matrix developed by Johnson and Bell ?
Answer: C
The keyed answer is 92 attributes.
The question concerns the cross-impact matrix of Johnson and Bell, one of the matrix methods used in impact assessment to show how one factor affects another. Searches of reference sources during checking did not find the number of attributes in that matrix, so the figure 92 rests on the University's key alone and could not be independently confirmed.
The other options, 90, 100 and 80, are round numbers. The key gives the one that is not round, which suggests it comes from a published count rather than an approximation, but that is an inference and not a confirmation. Cross-impact analysis in general lists the factors along both axes of a square matrix and scores the effect of each on every other.
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