Travel writers are sometimes offered free trips abroad, known as __________

The four A's, which are useful guidelines when listening to corrective feedback, should be utilized in which order?

A. Acknowledge, ask, align, add B. Ask, acknowledge, add, align C. Align, add, ask, acknowledge D. Add, acknowledge, align, ask

Open systems are characterized by ____________, or the ability to sustain themselves and grow.  

A. participation B. requisite variety C. negative entropy D. cultural diversity