--The cars were all late the bad weather.A.because B.thanks to C.because of

问题补充：

--The cars were all late the bad weather.

A.because B.thanks to C.because of

答案：

解析：句意：因为坏天气车都来晚了。because因为，引导原因状语从句；because of 因为，后跟名词或动名词。 the bad weather为名词词组，故选C。