This is a parallelism error question, however I was just wondering what is the subject in this question. Is it "model" or "executives"

#53. The normative model of strategic decision making suggests that executives examine a firms' external environment and internal conditions, and in using the set of objective criteria they derive from these analysis, can decide on strategy.

I believe that the subject is "model" and the verb here is "suggests". Am I correct?

By the way the correct sentence should be parallel with "examine and, ....... decide"