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. It marked the 5th World Council for the Welfare of the Blind in Sao Paulo.
B. The first Braille stamp was published by Canada Post in 2008.
C. Brazil, however, purchased the first raised-dot Braille stamp in the world in 1974.
D. It featured a yellow Labrador retriever guide dog, a species that is frequently used to assist the blind.