What did the Union Pacific and Central Pacific railroad companies do?
O A. They built a railroad between Texas and Mexico City.
B. They built a railroad along the Pacific Coast.
C. They connected the East and the West with a rail line.
O D. They connected the northwestern United States with Canada.

They connected the east and the west with a rail line The Union Pacific and Central Pacific built rails running west and east, respectively

They connected the East and the West with a rail line. ~ A P E X

Explanation:

Like it up     ~ A P E X ~

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the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.