What event marked the onset of the resurrection of death in the 20th century?

Many television shopping networks put a countdown timer on

the screen while trying to solicit the purchase of specific items. This gives the impression that there are only a few of that particular item available, and creates pressure to make a purchase very quickly. Thinking that one must buy "before time runs out" is known as the _____ heuristic. A) consensus B) scarcity C) availability D) representativeness

Vygotsky's zone of proximal development was:

a. the area in which children function best. b. the space between where children function independently and where they need adult assistance. c. the cognitive state they have achieved. d. language.