Official World Table Tennis Championships Were First Held in 1926

Official world table tennis championships were first held in 1926 under the auspices of the International Table Tennis Federation (ITTF; founded in 1926) . Women's doubles competition was added in 1929 and women's team competition in 1934. In 1980 the ITTF first sponsored a men's World Cup competition for the top 16 ranking players; it has been held annually since then. ("Sporting Record: Table Tennis," The New Encyclopaedia Britannica, 15th ed.)
This passage is made up of a(n) _____ and a(n) _____.

A) nonargument; explanation
B) argument; conclusion: It has been held annually since then
C) nonargument; unsupported assertion
D) nonargument; report