The British authorities in Andhra Pradesh took preemptive measures to prevent the spread of the Revolt, including:

The correct answer is: d) All of the above.

The British authorities in Andhra Pradesh took preemptive measures to prevent the spread of the Revolt, including disarming potential rebels, increasing military presence, and suppressing dissent and protests.

• Disarming potential rebels: The British authorities confiscated weapons from the local population in order to prevent them from being used against the British.
• Increasing military presence: The British sent more troops to Andhra Pradesh in order to suppress any potential uprisings.
• Suppressing dissent and protests: The British authorities cracked down on any dissent or protests against British rule.

These measures were successful in preventing the spread of the Revolt to Andhra Pradesh. However, they also led to resentment and anger among the local population, which would later contribute to the Indian independence movement.