The pioneer of letting blacks play baseball
Answer:
1884 was the year that Charles C. Converse announced that he had coined thon, a gender-neutral pronoun, by blending that and one. Thon could refer both to men and women, and it would come in handy in cases where gender is unknown, or irrelevant, or where it needs to be concealed.
Explanation:
In an informative/explanatory article about party planning, the concept that would be used to explain something to the reader is D. menu planning, or what to do in order to create the perfect menu for the party.