For the Situational and Functional Analysis in DSS (Decision Support

For the situational and functional analysis in DSS (decision support system) design, which of the following statements is appropriate?

A) The goal decomposition in situational and functional analysis should concentrate on concrete goals;
B) The goal decomposition in situational and functional analysis should start from specific goals to more general goals;
C) The activities around a low-level goal is the decision situation for high-level goals;
D) The situational and functional analysis can be performed using TSSL model;
E) The situational and functional analysis is in the second stage in DSS design.