Answer:
B) political-legal forces
Explanation:
The restaurants are acting based on a new city law that bans indoor smoking.
Political and legal environmental forces are simply changes in existing laws or new laws that alter the market or business environment of a company. Usually when people refer to political forces, they mean macroeconomic factors like change in taxes, new trade policies, etc. And when they refer to legal forces it means more specific factors like changes in property laws, anti-discrimination laws, or no smoking laws.