PLEASE HELP FAST! How did the arms race directly affect the American public? Check all that apply.

American men were required to join the military for the war in Korea.
The government increased the study of science and math in schools.
Citizens were taught how to prepare for an attack.
People became fearful that the USSR would use nuclear weapons.
Many became afraid that communist spies were living in the US.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.