The image shows a series of figures. This new way of counting included which idea?

O a decimal system

O a calendar system

O the concept of pi

O the introduction of algebra

(If you don’t answer this right and put random things to get points then my grandma will judge you so watch out >:])

This is an edge question

Lincoln believed the south and north should be unified and should look to rebuild together as fast as possible. While, on the other hand, Johnson believed in firmly punishing the south and focused on punishment on the south which caused for a slower reconstruction period.