In which statement is the transition used correctly?
1. Gold in California ignited interest in a railroad to reach the West. As a result, Americans disagreed on where to build the railroad.
2. Gold in California ignited interest in a railroad to reach the West. However, Americans disagreed on where to build the railroad.
3.Gold in California ignited interest in a railroad to reach the West. Therefore, Americans disagreed on where to build the railroad.
4.Gold in California ignited interest in a railroad to reach the West. Before this, Americans disagreed on where to build the railroad.