A sentence is given with a phrase highlighted in bold. Which of the phrases given below the sentence should replace it improve the sentence? If the sentence is correct as it is given and no correction is required, select 'No error' as your answer.
By the time the dictator realized what was happening, violent protests had already broken out in parts of the capital.

Options

A. already broken up
B. already broken off
C. already broken into
D. No error