Equipment risks are external risks

What is the appropriate term from systems theory for the response that says, "Cut back, slow down, discontinue"?

A. Negative feedback D. Morphogenesis B. Positive feedback E. Homeostasis C. Cybernetics

Regarding differences under the UCC in the treatment of merchants and nonmerchants, which is

true? A) Article 2 contains several provisions that either apply only to merchants or impose a greater duty on merchants. B) The UCC applies to merchants, but not to nonmerchants. C) The consideration requirement has been eliminated for contracts between merchants, but is still present in contracts involving at least one nonmerchant. D) The UCC requires merchants' contracts to be in writing, but not those of nonmerchants.