On completing both the course in experimental design and the developmental psychology course, Angela will have earned a degree in psychology. Since experimental design, which must be completed before taking developmental psychology, will not be offered until next term, it will be at least two terms before Angela gets her psychology degree. If the statements above are all true, which one of the following must also be true? ['There are no prerequisites for the course in experimental design.', 'The course in experimental design is an easier course than the course in developmental psychology.', 'Anyone who earns a degree in psychology from the university Angela attends will have completed the course in experimental design.', 'Once Angela completes the developmental psychology course, she will have earned a degree in psychology.']