Under what circumstances are trial-and-error approaches typically most successful?
A. when there are several widely different solutions
B. when there are several complex solutions
C. when there are only a few possible solutions
D. when there is only one hard-to-find solution
Answer: C
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The foundational randomized clinical trial, of polio vaccine, was conducted by ____
a. Edward Jenner b. Jonas Salk c. Benjamin Waterhouse d. John Snow
Which body part grows tremendously during infancy, reaching 75 percent of its adult weight by age two?
a. Heart b. Ears c. Brain d. Hands
An anxiety disorder characterized by recurrent panic attacks in which the person suddenly experiences intense fear or terror without any reasonable cause is called______ disorder
a. panic c. obsessive-compulsive b. generalized anxiety d. phobic
During therapy, Serena's client was talking of how depressed she was when her mother died. Serena made eye contact with her client, nodded her head in an affirming way, and said, "It sounds like this was a real trying time for you. I can tell that you must have been very sad and upset by this event." What technique is Serena using?
a. ?active listening b. ?free association c. ?paraphrasing d. ?empathy