Where did most polling take place prior to the 1920s and 1930s? O outside polling stations
O over the telephone
O in public meeting spaces
O in homes

Prior to the 1920s and 1930s, most polling took place:

O in public meeting spaces.

Explanation:

Public meeting spaces have been used for so many political activities.  Before the established of modern polling stations, which are equipped with necessary infrastructure, most polling had taken place in public meeting spaces.  This is because such spaces have remained the gathering point for the public and for political and social activism.

if you are on the computer you can not take a picture but you can upload one but i am not sure about phones but i'm pretty sure it's the but to upload one just click the paper clip looking thing/ link thingy thing and upload a pic

it continues in business