I dont quite understand the graphs - can you please explain which answer is correct and why.

B Consumer Goods D Refer to the above graph If the production possibilities curve for an economy IS at CD, but the economy is operatmg at pomt X: the reasons are most likely to be because of: O a. O b. O O d. increases in the quantity and the quality of resources improvement m labor productivity and the number of work-hours technolo g:cal progress and industrial change lack of full employment and inefficient allocation of resources.