D is the best, it lists factual evidence that people will read and say "wow that's impreesive"
Reptile, Scaly, Without Legs are some I could think of.
Through water sources like rivers or oceans
i believe the best answer would be A
MLA Style says numbers that can be written in one or two words (three, fifteen, seventy-six, one thousand, twelve billion) and to use numerals for other numbers (2¾; 584; 1,001; 25,000,000). APA Style, uses words for numbers below 10 and numerals for numbers 10 and above.