Read the statements below, which student conducted a scientific investigation?

A.) Amy laid a bundle of sticks and a bundle of yarn near the nesting site of local birds and measure how many birds preferred sticks to yarn

B.) Melanie set two different types of bird food in identical feeders in the same location and recorded the number of birds that visited each feeder

C.) Brigitte created a replica of an ecosystem that houses local birds

D.) Phillip researched the types of birds in the area and their natural food preference