PLEASE HELP I WILL GIVE BRAINLIEST

Answer:
Step-by-step explanation:
The given transformation is (x, y) ⇒([tex]\frac{x}{3}[/tex], [tex]\frac{y}{3}[/tex]).
Hence, under this transformation, the the corresponding lengths of the sides will become to one-third of its actual length.
The ΔMNO becomes ΔRST under this transformation.
Hence, MN = 3RS, NO = 3ST, MO = 3RT.
If RT = 3, MO = 9(option A).
If RT = 12, MO = 36(option B).
If RT = 9, MO = 27(option C).