1 because 5/6 is almost a whole. It can't be 1/2 because it would have been 3/6. And it's not 2 because it should have been an improper faction
China plate is 12 years (16-4) and Glass plate is 4 years (12÷3)
Swapping rows alters the sign of the determinant:

Multiplying a single row by a scalar scales the determinant by the same amount:

Then

Answer:
The answer is B
Step-by-step explanation: