Even though unlit city streets were dangerous,
a. most city planners did nothing about it.
b. professional police officers refused to patrol them.
c. factory workers had to travel to and from work in the dark.
d. city governments rejected electric streetlights.

Children begin to use tools at about what age? a. 18 months b. 2 years c. 1 year d. 6 months

As you drive in to school, you hear a random radio-show caller arguing that sun exposure really has not been shown to cause skin cancer and that some research suggests that skin cancer is completely genetic and not related to sun exposure at all. at the time, you think that this is a silly argument and that the caller does not know what she is talking about. however, two months later, you are outside without wearing sunscreen, and you find yourself remembering that you had read something about how the sun actually does not cause skin cancer. this process is evidence that has influenced your attitude

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?