Final Answer:
The answer of the given statement that "Plane R contains" is b) Line M and line f
Step-by-step explanation:
Plane R would contain entities that are coplanar. In the options provided:
a) Point M and line f - This combination is not necessarily coplanar in Plane R.
b) Line M and line f - Lines are coplanar, and if both line M and line f lie in Plane R, this option is correct.
c) Point X and line e - This combination is not necessarily coplanar in Plane R.
d) Point Y and point A - Points are always coplanar, but this doesn't guarantee they lie in Plane R.
Therefore, the correct answer is b) Line M and line f.