预防麻疹的关键措施是（）。

A.对病人要隔离至出疹后5日

B.避免易感染者接触麻疹病人

C.病室每日要通风30分钟

D.普遍接种麻疹减毒活疫苗

E.对流行期易感儿肌注入血丙种球蛋白

A company issues $10 million in 8 percent annual, 5-year bonds, when the market rate is 8.25 percent, The initial balance sheet liability and liability one year from the date of issue are closest to: Initial LiabilityLiability One Year Later（）

A. $9900837 $9884018

B. $9900837 $9917656

C. $10000000 $9975000