Which part of the nervous system carries messages to your brain while you are reaching for a book in the school library?

Research on inmates placed in solitary confinement suggests

that they experience more psychological symptoms, especially mood and anxiety problems, than other inmates. However, this finding may be difficult to interpret because some inmates may be more emotionally maladjusted to begin with. Which of the six principles of scientific thinking does this research finding fit into? A) Extraordinary claims B) Replicability C) Occam's Razor D) Ruling out rival hypotheses

A majority of the individuals who are classified as mentally retarded are considered to be __________

a) mildly retarded. b) moderately retarded. c) severely retarded. d) profoundly retarded.