From the given statements it can be concluded that the correct answer must be someone who works at a restaurant and brings food to the tables.
Option A is incorrect. A nurse works at the hospital and helps the doctors. Thus, it is incorrect.
Option B is incorrect. A journalist works for newspapers or magazines as a writer.
Option C is correct. A waiter works at a restaurant and it is their job to bring food to the tables. Thus, waiter is the correct option.
Option D is incorrect. A writer is someone who writes books or poems and so, it does not fit in the blank.