How did cities address the problems caused by urban living?

a. governments began to offer services such as mass transit and sanitation.
b. technological innovations improved crowding.
c. city planners increased land dedicated to public use.
d. residents organized neighborhood watch programs.

Choose any two countries in the world, and briefly discuss the evolution of the government of these countries.

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality.potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english

What film is responsible for the creation of the pg-13 rating?