which of the following incorporates best practices in email design

The definite noun phrase the following examples contains enough information for the reader to identify which examples are being talked about. The examples that the definite noun phrase refers to are the ones that are about to be mentioned. Which of the following statements is grammatically incorrect? And why? (I don't know the answer. Ignore the marks) Meats and vegetables are so expensive these days. We'd better eat out. I'd rather go Effective email campaigns depend heavily on thoughtful design. By following proven email design best practice, marketers can create emails that are both visually appealing and functional. Applying ...