Questions: An existing corporation that is registered to do business in a state or jurisdiction other than where it was originally incorporated is called?

The answer is B: Las compañías extranjeras.

Explanation for each option:

A. La economía - This translates to "the economy" in English. It does not relate to the concept of a corporation registered to do business in a state or jurisdiction other than where it was originally incorporated.

B. Las compañías extranjeras - This translates to "foreign companies" in English. This is the correct term for a corporation that is registered to do business in a state or jurisdiction other than where it was originally incorporated. In legal terms, such a corporation is often referred to as a "foreign corporation."

C. La inmigración - This translates to "immigration" in English. This term refers to the movement of people into a country to live or work, and it is not related to the concept of a corporation's registration status in different jurisdictions.