The response in the North to Black Codes increased support for

"Northern Democrats."

O "Southern Democrats."

"Radical Republicans."

"Moderate Republicans,"

Radical Republicans

Explanation:

During and after the American Civil War, a radical Republican is a member of the Republican Party emphasized the equal treatment and enfranchisement of the freed blacks and committed to the emancipation of the slaves.

The response in the North to Black Codes increased support for Radical Republicans

Their main goal was the permanent eradication of slavery, without compromise.

Answer: C. Radical Republicans