下列四个备选项中只有一个可以替代句中加粗的单词或词组，请将其代码填写在题后的括号内。The authorities are willing to permit a run-down in the country’s international reserves over the next few years as means of 【accelerating】 the introduction of foreign technology.
A.speeding up
B.speeding on
C.speeding off
D.speeding down
正确答案是A