I'm super happy with my cyborg buddy

Which of the following is an example of negative reinforcement? a.marty knocks over his mother's prize fern so she gives him a time out. b.gwen mows the lawn and her dad takes her out for ice cream. c.tara takes an aspirin, and her headache begins to go away. d. peter comes in late from his lunch and is fired from his job.

When members of congress must vote on a bill that is nonideological of one on which they have no specific position what are the most powerful influences

When did human beings first arrive in the americas? how did they get there?