Concept:
Economic systems differ on the basis of ownership, production, and distribution of resources.
Step 1:
Communism does not support private ownership of means of production; resources are collectively owned.
\[
A \text{ is incorrect}
\]
Step 2:
In capitalism, earning profit is the major motive of economic activity.
\[
B \text{ is correct}
\]
Step 3:
Socialism supports collective or state ownership of major means of production.
\[
C \text{ is correct}
\]
Step 4:
Canada and Mexico follow mixed economies, not complete communal ownership systems.
\[
D \text{ is incorrect}
\]
Step 5:
Hence, the correct statements are:
\[
B \text{ and } C \text{ Only}
\]
\[
\boxed{\text{(3) B and C Only}}
\]