You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are given a paragraph, a question and some answer options (associated with "A", "B", "C", "D", etc.) You need to list all the correct answer options with their associated letters (e.g. "A" can be a valid answer). Note that sometimes, more than one option can answer the question correctly and completely. In those cases, please generate all such options separated by a comma (e.g. "A, B" is a valid answer). Do not generate anything else apart from one or more of the following characters: 'A', 'B, 'C', 'D', etc.

Paragraph- Sent 1: Obama was born on August 4, 1961, at Kapiolani Maternity & Gynecological Hospital in Honolulu, Hawaii.
Sent 2: He is the only President to have been born in Hawaii.
Sent 3: He was born to a white mother and a black father.
Sent 4: His mother, Ann Dunham (1942-1995), was born in Wichita, Kansas, of mostly English descent, with some German, Irish, Scottish, Swiss, and Welsh ancestry. Question: How old was Obama's mother when he was born? (A) teenager (B) in his 40s (C) mid 20s (D) almost twenty.
Solution: D.
Why? Obama was born in 1961. His mother was born in 1942 and 1961-1942=19. Therefore, "almost twenty" answers the question sufficiently.

New input: Paragraph- Sent 1: While the Base Ball writers of the cities which comprise the Southern Association have no organized membership similar to the Base Ball Writers' Association of the major leagues and the organizations which are best known as the class AA leagues, they are a clever, hard-working group of young men, who have labored in season and out of season, not only to build up Base Ball but to build it up on the right lines.
Sent 2: Experience of more than a quarter of a century has most abundantly proved that the standard of Base Ball has steadily been elevated.
Sent 3: It needs no compilation of fact nor any dogmatic assertion on the part of the Editor of the GUIDE to attest that fact.
Sent 4: It is a present condition which speaks for itself.
Sent 5: The general tone of the players is far higher than it was and there has come into evidence a marked improvement in the spirit of the men who own Base Ball clubs.
Sent 6: In the earlier history of the sport there was a tendency to win by any means that did not actually cross the line of dishonesty.
Sent 7: Later there came a season when the commercial end of the game tended to encroach upon the limits of the pastime.
Sent 8: This has been repressed in the last two seasons and to-day the morale of Base Ball is of a higher type than it ever has been in the history of the pastime.
Question: Is any argument required to prove that the standard of Base Ball has steadily been elevated? (A) Maybe (B) Yes, because of writers enthusiasm (C) Yes, by players (D) No, because of the players.
Solution:
D.