The papal line of demarcation told spain and portugal

a)who was stronger.

b)which side of a line they could claim and control.

c)that the pope was the boss.

d)where they could live.

B) Which side of the line they could claim and control.
In this case, Spain gained control of the Americas since Columbus was the one who discovered them while Portugal gained control of Africa parts of Asia (giving them control over many important trade routes) in addition to the tip of South America (present-day Brazil)

Icould be wrong but i would say b.