Since $$10$$ is a factor of this product, the ones digit is $$0$$. 
What is the ones digit of the product $$80\times 70\times 60\times 50\times 40\times 30\times 20\times 10\times 5\times 2$$? 
Options:
A: $$0$$ 
B: $$2$$ 
C: $$5$$ 
D: $$7$$ 