Another method that might be desired is one that updates the Student's number of credit hours. This method will receive a number of credit hours and add these to the Student's current hours. Which of the following methods would accomplish this?a. public int updateHours( ){return hours;}b. public void updateHours( ){hours++;}c. public updateHours(int moreHours){hours += moreHours;}d. public void updateHours(int moreHours){hours += moreHours;}e. public int updateHours(int moreHours){return hours + moreHours;}