Can you beat this one?

The student wants to emphasize a finding that the species counts alone would hide. Which choice most effectively uses relevant information from the notes to accomplish this goal?

1. AField L, burned every two years, held 14 flowering plant species, while Field M, unburned for twelve years, held 13.
2. BThe counts were close, 14 species in Field L and 13 in Field M, but the two fields shared only 4 species.
3. CAn ecologist counted flowering plant species across two grasslands that had different histories of burning.
4. DField L held one more flowering plant species than Field M.