Please select the best answer from the choices provided

Which is the fairest way to take a representative sample from a population?
A.
choosing participants who will ensure that study results will support the hypothesis
B.
carefully selecting specific subjects who meet one’s criteria from the population
C.
ensuring that every subject in the population has an equal chance to be selected
D.
using a survey to screen out participants who may interfere with other subjects

What makes water a renewable source

In the spring of 1989, thousands of protesters gathered in tiananmen square in beijing, china. they rallied around a plaster statue that resembled the statue of liberty which they called “the goddess of democracy.” these protestors were seeking a) united states assistance in gaining better health care. b) economic reforms which would allow more chinese exports. c) the boycott of the future olympic games scheduled for beijing. d) political reforms to allow more freedom of speech and political representation.

The principal effector function of igm is