Can you help me please

Answer:
figure 2
Step-by-step explanation:
I used AC as my "compass".
0 degrees rotation (as the graphic) :
AC points to the right, B is up.
90 degrees rotation :
AC points straight down, B is to the right.
180 degrees rotation :
AC points to the left, B is down.
270 degrees rotation (= 90 degrees counter-clockwise) :
AC points up (C above A), B is to the left.
now this gets reflected across the y axis (that means flipped over or 3D- rotated by 180 degrees around the y axis).
so, AC still points up (and C is still above A), but B is now to the right.
Answer:
The answer of upper level of Figure 2 IS correct
Step-by-step explanation:
Actually, clockwise rotation 270° is the same as counterclockwise rotation 90°. May be it will be easier to clear out the thinking process.
Picture attached.. We can set A as the imaginary origin (0,0) to rotate.