Complete the sentence: Functional exercises $q,,$ whereas full$-$scale exercises $$

A$.$ are designed to test coordinated responses and rapid problem solving skills; are designed to validate and evaluate capabilities, multiple functions and$/$or sub$-$functions, or interdependent groups of functions

B$.$ involve simulated deployment of resources and personnel; involve actual deployment of resources and personnel

C$.$ are discussion based; are operations based

D$.$ involve actual deployment of resources and personnel; involve simulated deployment of resources and personnel