Which option best explains how the Kushan Empire came to an end?

(1 point)

Because they were positioned between Roman, Chinese, and Indian Empires, they were constantly under attack from all sides.
The expansion of the Roman Empire led to their downfall, and Bactria was made into a Roman province.
They were conquered by Alexander the Great and became a Hellenistic
Kingdom.
They lost territory to Indian kingdoms and the Sassanid Empire of
Persia.

They lost territory to Indian kingdoms and the Sassanid Empire of Persia.