What is the significance of the Himalayan Mountains for the Indian Subcontinent?
A.
They separate the Indian Subcontinent from Asia.
B.
They make trade between the Indian Subcontinent and Asia easier.
C.
The majority of people in the Indian Subcontinent live there.
D.
They provide the Indian Subcontinent with key minerals, such as salt, iron, silver, and gold.

are their options?

otherwise i can't

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

small european communities with shared traditions consolidated into large new states (apex)