Use This Graph to Answer Questions 21 and 22

Use this graph to answer questions 21 and 22.
Figure 13.3:
-Using Figure 13.3,which of the following is correct about the BP_C horizontal curve?

A) It assumes perfect capital mobility.
B) It assumes perfect substitutability between domestic and foreign assets.
C) It represents equilibria in the balance of payment.
D) All of the above are correct.