The report on the gross national product—the nation’s total production of goods and services—showed that second-quarter inflation was somewhat lower than a previous estimation and the savings rate slightly higher.

(A) a previous estimation and the savings rate slightly higher

(B) a previous estimation and with a slightly higher savings rate

(C) a previous estimate and that the savings rate is slightly higher

(D) previously estimated and a slightly higher savings rate（E）

(E) previously estimated and that the savings rate was slightly higher

A,B,C 的错误是不是这里是抽象名词，而动词优于抽象名词，所以不选

好像不是这个原因吧~

如果用名词形式的话就是...inflation was ... lower than ... estimation, 拿inflation 和estimation比较，显然不合逻辑。

而...inflation was ... lower than ... estimated实际上是...inflation was ... lower than (it had been)... estimated