A)Only when the researchers have obtained sufficient data can they come to a sound conclusion.B)But trucks are big and carry heavy load: they are accepted because they perform a needed service, making America move.C)Parents planning to divorce do not sufficiently prepare their children for the coming crisis, nor do they provide them with the necessary assurances that they will be cared for in the aftermath.D)As for the influence of computerization, nowhere have we seen the results more clearly than in the bank. 只有当研究者获得充分的数据，他们才能得出一个正确的结论。