Which of the Following Examples Illustrates Research as It Is

Which of the following examples illustrates research as it is described in your textbook?

A) Sally is writing a paper about the effects of the Harry Potter books on the reading habits of fourth graders in the United States and United Kingdom.She goes to a research library to find information to include in her paper.
B) Ian wants to know why the population of songbirds has declined in recent years in the Sutton Wilderness Area.He carefully collects soil and water samples,systematically surveys the entire area for predators,and then sits down to make sense of his findings.
C) Leonard is starting a woodworking business and is not sure how to calculate the cost of his labor so he can be both profitable and fair to the customers.He asks several established business owners how they calculate labor changes.
D) Bill is doing a report on the sonnets of Shakespeare.He carefully reads a number of sonnets and then carefully reads scholarly reviews of those same sonnets written by various Shakespeare scholars.He synthesizes all of this information in his report.