Assume that a country called Autaria has a current account balance of -$200 billion for the financial year 2018-19. Assume further that Autaria's non-reserve assets increased by $300 billion while non-reserve liabilities increased by $100 billion during the same period. Assuming no statistical discrepancy, Autaria's Official Settlement Balance should be:

A.-$200 billion

B.+$200 billion

C.+$400 billion

D.-$400 billion

E.$0