Environmental theatre, also known as site-specific or immersive theatre, involves performances?

a
In a simple, unadorned, black-walled space with a flat floor.
b
In a circular or oval space surrounded by seating.
c
With flexible staging, minimal set designs, and heightened audience involvement.
d
That take place in non-traditional venues, repurposed for theatrical performances.

d

That take place in non-traditional venues, repurposed for theatrical performances.