Why did president johnson lose control of reconstruction?

a: he was removed from office after impeachment by congress.
b: white democrats were able to win majorities in the new southern legislatures.
c: military governors running the former confederate states began to ignore his orders.
d: radical republicans expanded their congressional majority in the elections of 1866.

i need the answer too man

from my own personal expirence food stamps has alot this makes it eaiser so we can affod bills and so we can life a better lifestyle not needing to worry about paying actual money to buy food since most people spend 100-300 dollars a month on food so this alot so we can afford other bills and other stuff we need

i would think the answer is between b and d i would say d sorry if wrong