单选题 Scientists use observation and experimentation to examine a specific concept ______ existing theories and principles.
A. in the light of B. in view of
C. as to D. in the interest of

【正确答案】 A

【答案解析】[解析] A选项：in the light of的意思为“根据，依照”，如：In the light of these changes，we must revise our plan．(鉴于这些变化，我们必须重新修订我们的计划。)句意：依照现有理论和原则，科学家们运用观察和实验检验一个特定的概念。故选A。
其他三项意思分别是：in view of鉴于，考虑到；as to至于，关于；in the interest of为了……的利益。