Câu 7: 70-480: MCSD Programming in HTML5 with JavaScript and CSS3

You are developing a JavaScript library. You have the following requirements: ✑ Custom exceptions must include an error message and custom error number. ✑ These exceptions must be thrown when data validation errors occur. ✑ Developers must call the library to easily catch the exception and identify the problem. You develop the following code. (Line numbers are included for reference only.) You need to complete the code to meet the requirements. Which line of code should you insert at line 09?

1. A. throw new ValidationException.Exception (123, "Day of week must be les3 than 7"); — đáp án hiện tại
2. B. return new ValidationException(123, "Day of week must be less than 7");
3. C. throw ValidationException(123, "Day of week must be less than 7");
4. D. catch ValidationException(123, "Day of week: must be less than 7");