Which best describes the significance of the Treaty of Tordesillas?

Question

It was the first time in world history that two European nations agreed to claim and share the same piece of land.

It was the first time in world history that two European nations declared peace with the Ottoman Empire without the Catholic Church’s consent.

It was the first time in world history that two European nations collaborated to arrange a peace treaty between warring African tribes.

It was the first time in world history that two European nations sought a third party to mediate a dispute regarding foreign lands.

is it b?

Answer 1

"a" doesn't sound like an accurate answer.

Answer 2

Neither answer is correct, Please do not post this question again.

https://www.britannica.com/event/Treaty-of-Tordesillas