-The Above Figure Shows a Nation's Production Function

-The above figure shows a nation's production function.Point B is ________ and ________ because ________.

A) unattainable;inefficient;the nation is using resources inefficiently
B) unattainable;efficient;the nation would be using resources efficiently if it could attain this level of production
C) unattainable;inefficient;the nation is using resources efficiently but it could be more efficient
D) attainable;efficient;the nation is using resources efficiently
E) attainable;inefficient;the nation is using resources inefficiently