Answer:
B
Explanation:
Farmers were at a later time, they haven't found out how to grow things yet. Explorers didn't exist until hundreds years later. Metal workers is more in the future.
Answer: Regression-artifact
Explanation:
Regression artifact is the process in which non- random samples that represent the population is selected along with defective correlation with each other .
According to the question, cross-over effect in data can tend to eliminate the impact of regression artifact in which different treatment is received by subject in a series to cancel out regression.
Other options are incorrect because history, attrition or local history are not the factors that can be eliminated by crossover effect.Thus, the correct option is regression artifact.
Answer:
Personality disorders are thought to be caused by a combination of these genetic and environmental influences. Your genes may make you vulnerable to developing a personality disorder, and a life situation may trigger the actual development.
