When assigning CPM weights for a Spirit$$ analysis, what is the best$$ approach?

A$.$Assign the same weights to all factors so as not to add any bias to the CPM$.$

B$.$Assign different weights ranging from $0\mathrm{.}05$ to $0\mathrm{.}10.$

C$.$Assign weights based on the importance to Spirit of each factor.

D$.$Assign weights to factors based on their importance relative to other factors