The correct option is C Employment
Option C: The column in newspapers, where the ads to help people find jobs is
posted, is called the employment column. So, the correct answer is option
C 'employment'.
Option A: 'Employer' refers to a person or organization that employs people. It does not describe 'columns'.
Option B: 'Employee' is a person who is employed by a person or company, and receives his wages through this work. It cannot describe the word 'columns'.
Option D: Occupation refers to the same thing as 'employment', which is: a job or a profession. But the column in newspapers is named as 'employment' column, as opposed to this option. Occupation is generally used in forms and while asking someone what their occupation is.
Hence options A, B and D are incorrect.