How long did it take the human population to double from 500 million to 1 billion?

The confirmation bias

a. refers to the tendency to overestimate the frequency of events based on how easy it to remember examples of that event. b. is the tendency to only seek information that is likely to support one's decisions and beliefs. c. refers to how decision issues are posed, and how choices are structured. d. is the tendency to stick to ones initial beliefs even when evidence contradicts them

Jill is extremely inattentive, has poor impulse control, and is highly active. Based on these symptoms, what developmental disorder might Jill have?

a. autism b. schizophrenia – childhood onset c. ADHD d. dyslexia