Given beloware four jumbled sentences. Select the option that gives their correct order.

A. The students often go about their business, singing along in the corridors.

B. But for the students of St. Ambrose High School, it no longer dictates their day.

C. A bell can sound gloomyor cheerful depending on whenit is rung.

D. It has been scrappedin favour of music which now breaksup the time table of the school .