The correct answer is: b) Discouraged.
Haggling for taxi fares is discouraged in most countries, as it can lead to disputes and uncomfortable situations for both the driver and the passenger. In some countries, haggling is even illegal.
In the United States, haggling for taxi fares is not expected or encouraged. Taxi fares are typically set by the city or municipality, and drivers are not allowed to negotiate fares with passengers. If a passenger tries to haggle with a driver, the driver may refuse to take them to their destination.
In some other countries, such as India, haggling for taxi fares is more common. However, it is still important to be aware of the local customs and etiquette before trying to haggle. In some cases, haggling may be seen as disrespectful or even rude.
If you are unsure whether or not haggling is acceptable in a particular country, it is always best to ask a local or check with the taxi company before you get in the cab.