【正确答案】 A

【答案解析】[解析] 事实细节题。由第二句话“life is probably a normal phenomenon wherever the conditions are right，with the added qualification that proper conditions are not necessarily only those of the earth．“只要情况适当，生命就可能是一种正常现象，所附带的条件是，适当的情况并不一定仅限于地球上的那些而已”可得出答案。