The gupta empire resisted invasion by these people for a long time

the Gupta empire continued resisting the invasions of the Huns, a nomadic people who lived in Central Asia and Eastern Europe, between the 4th and 6th century.  

The Hun invaders were defeated by Bhanugupta in 510. They were also defeated and driven out of India in 528 by king Yashodharman, and by emperor Narasimhagupta.

It is said that such invasions had long-term effects on India, contributing to the end of this classical Indian civilization.

The correct answer is Hunas or the Huns

b: the establishment clause  

b: socialism  

i think they came to washington to protest