By the second half of 1865, most northerners were upset with Johnson because

A) he was not doing enough toward reconstruction.
B) he wanted to remake southern society.
C) he supported southern ideology that re-admittance should be painless.
D) he was too tough on readmitting requirements for the southern states.

Northerners

Residents or natives of the northern part of a country or region, often distinct in cultural, social, or economic practices from those in the southern part.

Re-Admittance

The process of being allowed to return or gain entry again into a place, organization, or institution from which one was previously excluded or had left.