ACCorDing to thE pAssAgE, spAnish vEssEls BEgAn to Bring orAngE trEE sEEDling to north AmEriCA whEn ______.
A．thE unitED stAtEs AgriCulturAl lAws wErE rEvisED
B．AmBitious sAilors BEgAn to smugglE sEEDs
C．DoCtors rEportED A lACk oF mEDiCAl suppliEs
D．AuthoritiEs rEAlizED thAt sEEDs DiD not trAvEl wEll