Which of the following is an appropriate hypothesis to answer the question, why are leaves green?

A: To study the coloring of leaves, scientists grew 250 maple trees within a greenhouse over the course of six months and analyzed the structure of over 1,000 leaves.

B: Leaves are green due to the presence of chlorophyll, a pigmented compound found within the leaves.

C: Based upon the given data, which spans 25 years of research, scientists determined that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.

D: Using the work of previous scientists and adding new data to their information, scientists have found that leaves are green due to the presence of chlorophyll, a pigmented compound found within leaves.

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