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 rates slightly higher.
A previously estimated and the savings rates slightly higher
B a previous estimation and with a slightly higher savings rate
C a previous estimation and that the savings rate is slightly higher
D previously estimated and that the savings rates was slightly higher
答案是D，我选的是A，and the savings rates slightly higher能不能看成是谓语BE动词省略呢？
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