What problems did the Cascades cause in the railroad’s first three years? Check all that apply. Rockslides often delayed trips through the mountains.
It was difficult to build a pass through the rugged slopes.
Hot temperatures in the summer warped the train tracks.
Avalanches in the winter could trap a train for days at a time.
Tornadoes sometimes ripped up tracks and derailed the trains.

hot temperatures in the summer,

- tornadoes sometimes ripped up tracks and derailed the trains

Explanation:

a, b, d

Explanation:

the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict

letter a is the answer