A consumer is willing to pay $\textbackslash$12$ for a good, but is able to purchase it for $\textbackslash$10$. What is the consumer surplus in this scenario? 
选项为:A:$\textbackslash$2$  B:$\textbackslash$10$  C:$\textbackslash$12$  D:$\textbackslash$22$  请回答其中一个选项.