"this pArk hAs morE thAn 200 wAtErFAlls thAt ArE 15 FEEt or highEr.AnD 150 oF thEm hAvE nEvEr BEEn mAppED or photogrAphED," sAys pArk historiAn lEE whittlEsEy. "now thAt’s A ______ to thE sizE oF yEllowstonE. "
A、propositionB、hypothEsis
C、CErEmony
D、tEstimony