PLSSS HELP 30 POINTS Triangle EFG is graphed as shown.

Triangle EFG will be rotated 90° counter-clockwise
around the origin, then reflected across the y-axis to
produce the image triangle E' F'G'.
Which additional transformation will map triangle E' F'G'
back onto triangle EFG?

Answer choices:
A. reflection across the line y=x

B. rotation 270° clockwise around the origin.

C. rotation 180° around the origin