D3

A)
          1. The first video i watched was from 1952, when Eisenhower ran against Stevenson. It was paid for by Citizens for Eisenhower.
          2. This ad was meant to make Eisenhower seem like the good guy, because he had a catchy tune, not so much that he was better than the other guys, although it did banter them a little.
          1.The second video I watched was from 1984 when Reagan ran against Mondale. The ad was in support of Reagan.
         2. The commercial had lively music and portrayed an upbeat America. It was trying to instill that Reagan was doing a wonderful job and should stay in office.
         1. The third video I watched was from 2008 when Obama ran against McCain. The ad was in support of Obama.
          2. The ad showed a Obama speaking about how much he cares about this country and what he'd already done to improve it and how he'd worked his way up, appealing to the working class. His voice was soft and calming.

B)
        1. The biggest change was color and video quality. In '52, the ad was in black and white and depicted cartoon drawings, in '84 it was in color but the picture wasn't so clear, and in '08 it was also in color but the quality of the video was enhanced and very nice looking. Another change was the way they sent the message; in '64 there were cartoons singing, in '84 there was a background voice showing video of others, and in '08 it directly showed the candidate, who was also the speaker, as well as pictures of his life and others.
         2. The most effective ad was the first one I watched, the singing cartoon for Eisenhower. It was so catchy and said his name over and over that it stuck in my head. I think the purpose of that ad was just to get his name out, not to propose any policies though.