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 refers to adopting uniform track gauges and rail specifications across different rail lines. This eliminates incompatibility, allowing trains from separate networks to operate on each other's tracks. The other options relate to refrigeration technology, passenger comfort features, and the opposite of standardization respectively.

Answer:

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