Uncertainty in demand and economic factors should be included in the financial evaluation of supply chain design decisions because

$$ a$.$ the inclusion of certainty may have a significant impact on this evaluation.

$$ b$.$ the exclusion of certainty may have a significant impact on this evaluation

$$ c$.$ the inclusion of uncertainty may have a significant impact on this evaluation.

$$ d$.$ the exclusion of uncertainty will not have a significant impact on this evaluation.