Ohn recently suffered a blow to the head. Since then, he has found it quite difficult to express his thoughts. Although his ability to think has not been impaired, he cannot find the right words to say what he wants to say. However, he speaks freely and with proper syntax. John most likely suffers from . a. ​retrograde amnesia
b. Broca's aphasia
c. ​Wernicke's aphasia
d. Epilepsy

Children begin to use tools at about what age? a. 18 months b. 2 years c. 1 year d. 6 months

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is:

How long was it from the time african american men were given the right to vote until women were given the right to vote?