Just because
She got the promotion. She is good at her job. If the first sentence is a result of the second sentence, there are three ways to write it: She got the promotion because she is good at her job. She got the promotion as she is good at her job. She got the promotion, since she is good at her job. In an absolute grammatical sense, all three sentences are correct. But, as with all self-proclaimed language mavericks, we are uncomfortable with “as” and “since” used as causative conj