Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

A. In a study sponsored by World Health Organisation and carried out by Harvard School of Public Health, the global burden and injury indicated that stress diseases and accidents are going to be the killers in 2020.
B. Road traffic accidents are going to be the third largest killers.
C. These accidents are also an indicator of psycho-social stress in a fast-moving society.
D. The heart disease and depression - both stress diseases - are going to rank first and second in 2020.