I have 5 questions pls check them! Medal.

Which two transformations could have been performed on triangle DEF to form congruent triangle ?

Choose exactly two answers that are correct.

A. Triangle DEF was rotated 90° counterclockwise around the origin to form triangle DꞌEꞌFꞌ.

B. Triangle DEF was reflected across the y-axis to form triangle DꞌEꞌFꞌ.

C. Triangle DꞌEꞌFꞌ was translated 1 unit left and 3 units down to form triangle DꞌꞌEꞌꞌFꞌꞌ.

D. Triangle DꞌEꞌFꞌ was rotated 90° clockwise around the origin to form http://static.k12.com/calms_media/media/1573500_1574000/1573517/1/422c07adfc98ab3e4e279b71dfe16e4865bd4c9f/MS_IMC-141216-110713.jpgiangle DꞌꞌEꞌꞌFꞌꞌ.

Question

I have 5 questions pls check them! Medal.

Which two transformations could have been performed on triangle DEF to form congruent triangle   ?
 
Choose exactly two answers that are correct.
  
A. Triangle DEF was rotated 90° counterclockwise around the origin to form triangle DꞌEꞌFꞌ.
 
B. Triangle DEF was reflected across the y-axis to form triangle DꞌEꞌFꞌ.
 
C. Triangle DꞌEꞌFꞌ was translated 1 unit left and 3 units down to form triangle DꞌꞌEꞌꞌFꞌꞌ.
 
 D. Triangle DꞌEꞌFꞌ was rotated 90° clockwise around the origin to form http://static.k12.com/calms_media/media/1573500_1574000/1573517/1/422c07adfc98ab3e4e279b71dfe16e4865bd4c9f/MS_IMC-141216-110713.jpgiangle DꞌꞌEꞌꞌFꞌꞌ.