Assertion (A): about 80% of Canadian manufacturing is concentrated in South Ontario and St Lawrence lowland region. Reason (R): There are sufficient deposits of coal in the South Ontario and St Lawrence lowland region.

• A. A is true and R is the correct explanation of A.
• B. A is true but R is not the correct explanation of A.
• C. A is true but R is false.
• D. A is false but R is true.