All of the following were features or consequences of Pinckney’s Treat

All of the following were features or consequences of Pinckney’s Treaty EXCEPT

A) it opened the Mississippi River and the port of New Orleans to U.S. commerce.
B) it pushed the northern border of Florida further northward and westward.
C) it was a substantial political success for President Washington and helped guarantee the security of the nation.
D) it produced a significant deterioration of diplomatic relations between the United States and Spain.

ANSWER
Answer: D