All the people at the conference are. A: mathematic teachers B: mathematics teacher C: mathematics teachers D: mathematic’s teachers

All the () of the city went to the meeting last Saturday. A: mathematic teachers B: mathematics teacher C: mathematics teachers D: mathematic's teacher

Scientists concluded from the experiment with chimpanzees and chocolate chips that chimpanzees ______. A: lack abilities that other primates have B: prefer to work in pairs or groups C: exhibit behavior that indicates certain mathematic ability D: have difficulty selecting when given choices