Who chose electors prior to 1820, and why did the process change?

state lawmakers chose electors, but the process changed because people wanted more of a say in the selection.

federal lawmakers chose electors, but the process changed because state lawmakers wanted more of a say in the selection.

white men who owned land chose electors, but the process changed because those who did not own land wanted a say in the selection.

all white male citizens chose electors, but the process changed because state lawmakers wanted more control over the selection.