What causes led to Spanish Empire's exploration of new lands? What were the consequences of the Spanish Empire exploring new lands?

Which entity owns most if the television stations, radio stations, and newspapers in the united states

Afederally funded research study involving children 8 to 12 years old involves collecting a single voided urine sample to assess the frequency of asymptomatic proteinuria (higher amounts of protein in the urine without any signs or symptoms of illness or infection). your irb has determined that assent of children age 8 and older is required for the study. a 10-year-old firmly declined to participate in the study described above. which of the following procedures best describes the action to be taken by the investigator? a. honor the child's decision b. consent both of the child's parents instead c. consent one of the child's parents instead d. request the child reconsider assenting to the study

Explain why societies cannot make a choice above their production possibilities frontier and should not make a choice below it.