How is india distinct from the rest of asia?
a. it is a landmass.
b. it is a peninsula.
c. it is a subcontinent.
d. it is an outcropping.

India is not the only landmass in Asia. That doesn't even make sense. Although India has outcrops, it doesn't fully consists of it. And it also isn't the only peninsula, since we have the Malay and the Qatar peninsula.

c.It is a subcontinent.  

This is the only correct one. Asia has no other subcontinent and "The Indian subcontinent is a term mainly used for the geographic region surrounded by the Indian Ocean"

C. It is a subcontinent

i believe it's that they cared for people. hope this ! : )