Question

what was a result of creating rail standardization?
railways were able to transport meat without spoilage.
trains provided cars with pull - down beds for overnight travel.
trains from different rail lines could use each other’s tracks.
rail companies began to create their own styles of rails and tracks.

Explanation:

Rail standardization means establishing a common standard for rails and tracks. If there is a standard, trains from different rail lines can use each other's tracks because the tracks meet the same standard. The first option is about refrigerated transport for meat, not directly related to rail standardization. The second option is about train car features for overnight travel, not related to rail standardization. The fourth option is the opposite of standardization, as standardization would reduce creating different styles. So the correct result is that trains from different rail lines could use each other’s tracks.

Answer:

C. Trains from different rail lines could use each other’s tracks.