Which statement is correct? light can travel in a vacuum, and it travels faster if the light source is moving. light can travel in a vacuum, and its speed is constant if the source is moving or stationary. light can travel in a vacuum and will travel faster if the light source is moving. light can travel in a vacuum, and it travels more slowly if the light source is stationary.

One historical reason that people in the indian subcontinent have been reluctant to use livestock for food has been that a. their digestive systems are unable to handle meat and proteins b. they refused to eat meat in order to show resistance to british imperialism c. they are able to use cattle as a labor mainstay of their agriculture d. they can use the meat from cattle as fertilizer to make crops grow better