Final answer:
The statement that the first National FFA Convention Chorus was established in 1947 is true. This reflects the National FFA Organization's efforts to include cultural activities for its members, in addition to its focus on agricultural education.
Step-by-step explanation:
The statement that the first National FFA Convention Chorus was established in 1947 is indeed true. The National FFA Organization, formerly known as the Future Farmers of America, is a youth organization that promotes agricultural education. The establishment of the National FFA Convention Chorus was one of the ways the organization embraced the cultural aspect of its members, providing them an opportunity to showcase their musical talents at national events.
In contrast, let's clarify some historical facts mentioned in the other exercises for context. The Constitutional Convention did indeed meet in 1787 with the initial purpose of revising the Articles of Confederation, which makes statement 1 true. However, it ended up proposing a new constitution altogether. Benjamin Franklin was a staunch abolitionist and played a key role in the anti-slavery movement, which makes the statement about him establishing the first abolitionist society in America also true. And, following the Civil War, during the Reconstruction period, the First Reconstruction Act in 1867 did divide the South into military districts, which validates the truth of that statement as well.