The second alternative is correct (B).
"Gold in California ignited interest in a railroad to reach the West. However, Americans disagreed on where to build the railroad."
The use of the conjunction "however" in this context connects the two sentences with a contraposition, giving the exact meaning for the continuity of the text. In this way, it became clear that there was a need to build a railroad, but there was no unity among Americans about where to build the railroad.
Francesca uses oil paints, but Martin prefers watercolors.
Answer:
They would have decided to fight.
I would go with B, I do not for sure know the answer but that is the one that seems to make the most sense
Answer:
Unifies the story
Explanation:
The main idea is what makes up the story
