A 10% , 10-year bond is sold to yield 8%. One year passes, and interest rates remained unchanged (8%). Holding all other factors constant, the bond's price during this period:（）

单项选择题When potential real GDP is less than actual real GDP, the economy is most likely experiencing:（）

A. recession.
B. stagflation.
C. inflation.

单项选择题If no other estimator of a given parameter has a sampling distribution with a smaller variance, the estimator used is best characterized as:（）

A. accurate.
B. consistent.
C. efficient.