Use the Figure Below to Answer the Following Questions

Use the figure below to answer the following questions.
Figure 11.2.1
There are no exports or imports in this economy.
-Refer to Figure 11.2.1.When real GDP is equal to Y_b, then aggregate planned expenditure is

A) less than real GDP, and real GDP decreases.
B) greater than real GDP, and real GDP increases.
C) equal to real GDP, and real GDP neither increases nor decreases.
D) greater than real GDP, and real GDP decreases.
E) less than real GDP, and real GDP increases.