Daliah was at a diner with her 3-year-old son. When he was done with his lunch, he wanted to take his tray to the trash can. Because Daliah wasn't sure he would be able to complete that task without dropping everything, she helped him hold one side of his tray. When she realized he could hold the tray without dropping it, she allowed him to complete the task all by himself. According to Lev Vygotsky, in which of the following concepts did Daliah just engage?a) private speech.
b) the zone of proximal development.
c) ego integrity.
d) scaffolding.

Passport video produced a video documentary titled the definitive elvis, comprising sixteen one-hour episodes. the producers interviewed more than 200 people regarding virtually all aspects of elvis's life. passport sold the videos commercially for a profit. approximately 5 to 10 percent of the videos were composed of copyrighted music and appearances of presley on television and in movies owned by copyright holders other than passport. passport did not obtain permission to use those copyrighted works. elvis presley enterprises, inc., and other companies and individuals that owned copyrights to the presley works used by passport sued passport for copyright infringement. passport defended, arguing that its use of the copyrighted materials was fair use. the u.s. district court held in favor of the plaintiff copyright holders and enjoined passport from further distribution of its documentary videos. passport appealed.did passport act ethically in including the elvis presley copyrighted material in its video? why do you think passport video did so? has there been fair use in this case, or has there been copyright infringement?

Is there such a thing as a social structure that constrains individual action, or is society nothing more than a figment of our imaginations?

What is the rule relating the ratio of marginal utility to prices of two goods at the optimal choice? explain why, if this rule does not hold, the choice cannot be utility-maximizing.