c)free-soilers and slavery advocates
If there is a tie in the electoral college between two candidates, it is then up to the House of Representatives to pick the winner. Each state delegate would have one vote in this tie-breaker election. The Senate would be responsible for picking the Vice-President in the aforementioned scenario. This has happened just a few times in US history.
In response to the Berlin Blockade the United States began a massive airlift off food,water, and medicine to the citizens of the besieged city. Supplies from American planes sustained over 2 million people in West Berlin.