Consider the following statements regarding the functions of an operating system in a computer:1. It controls hardware access.2. It manages files and folders.3. It provides a user interface.4. It manages applications.Which of the above statements are correct?

• A. 1, 2 and 3 only
• B. 1, 2 and 4 only
• C. 3 and 4 only
• D. 1, 2, 3 and 4