U.S. Treasury announces plans to sell $50 billion of new bonds. The announcement was not expected. What effect, other things held constant, would that have on bond prices and interest rates?

Group of answer choices

There would be no changes in either prices or interest rates.

Prices and interest rates would both decline.

Prices and interest rates would both rise.

Prices would rise and interest rates would decline.

Prices would decline and interest rates would rise.