单项选择题
A．they depended on the potato B．they were forced to move to America C．the weather conditions in Ireland were not fit for growing the potato D．the potato harvest was bad
A．coffee was first discovered by Kaldi B．coffee was first discovered by Kaldi's goats C．coffee was first discovered in south American countries D．coffee drinks were first made by Arabs
A．Food B．Chocolate drinks C．Potato D．Coffee