Each triangle in the diagram is a reflection of another triangle across one of the given lines. how can you describe triangle 2 by using a reflection rule?

i. rl (triangle 3)
ii. rm(triangle 2)
iii. rm (triangle 1)

a. i only
b. i and iii only
c. ii and iii only
d. i, ii, and iii
(i put c. but it was wrong, now i'm thinking