A prototype that works but is inefficient is referred to as a "first-of-a-series prototype."

Which of these statements is true?

A. Once a listing agreement is signed by all parties, it cannot be changed. B. The seller can change the listing agreement whenever he or she wants. C. A listing agreement can be modified, but only if all parties agree in writing. D. A listing agreement can change by the mutual verbal agreement of all parties.

Probabilistic techniques assume that no uncertainty exists in model parameters

Indicate whether this statement is true or false.