In each of the following questions, one phrase has been given and it has been followed by four sentences. You have to find out in which of these sentences the phrase has been used properly according to its meaning and mark your answer from the options. Mark your answer 'all correct' if you find that phrase has been applied properly in all the sentences.

cover the waterfront

I. The doctor advised us to cover the waterfront of the patient.

II. Lewis Hamilton and Nico Rosberg were covering the waterfront speedily.

III. You should cover the waterfront in home before it starts raining.

IV. This thesis will attempt to cover the waterfront of English Law from 1950 to the present.