What prenatal technique uses high-frequency waves to examine the characteristics of the fetus in-utero?

The babbling observed in infants

a. reflects the adult speech that they hear. b. contains simple words. c. is their first attempt to communicate verbally. d. is unique to a culture. e. does not resemble the sounds of speech.

All of the following are examples of informational social influence EXCEPT:

a. You are running a race, and you wait to check which of two roads the other runners follow. b. You've just started work at a new job, and a fire alarm goes off. You watch your coworkers to see what to do. c. You ask your advisor which classes you should take next semester. d. You decide to lose weight, because the people you see on the covers of popular magazines are thinner than you are and you want people to like you more.