After achieving a result, good managers invest time in reflecting on what went well and what could have gone better. They consider whether they were as effective as they could have been and whether they got the result in the most efficient way possible. Then they apply what they have learned to future projects. Congratulations! You just graduated with a degree in management. As you reflect on your school experience, you make a list of the reasons you were so efficient with your studies. Which of the following statements relate specifically to your efficiency?

a. Last year, you reviewed the course schedule to ensure you knew when to enroll in certain electives that are offered only once per year.
b. When registration opened for each term, you immediately registered for the classes you needed, especially the ones that fill up quickly.
c. Throughout your time in school, you chose electives that would provide you with a well-rounded education, and not based on how easy you heard the classes were.
d. After each semester, you asked your adviser to review your progress to ensure you remained on track for your anticipated graduation date.

The hawthorne works was a large western electric factory with 45,000 employees. during the 1920s and 1930s, hawthorne works was the site of some well-known industrial studies. in one of the studies, researchers investigated the impact of different working conditions on worker productivity. prior to the start of the study, researchers secretly measured workers' productivity for several weeks. then researchers chose two workers, who then chose their own teams. the teams were separated from the general workforce and completed their work in different experiment rooms where the researchers could observe them more easily. over a 5-year period researchers manipulated the structure of the workday for each team (number and duration of breaks and number of hours per shift). for each of these changes in working conditions, the researchers measured the effect on productivity. for some conditions, such as frequent short breaks, workers rebelled by intentionally decreasing productivity. why did the researchers secretly measure the workers' productivity before creating the two treatment groups? a, to create similar treatment groups so that a cause-and-effect relationship could be establishedb, to draw conclusions about the productivity of all workers in the plant based on the test groupsc, to directly control for confounding variablesd, to provide a baseline for measuring worker productivity

Abond purchased for $950 was sold for $980 after one year. the interest received during the year is $25. the bond's yield is:

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