第二节语法和词汇知识（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
With the price of ______ petrol rising, the bicycle may become ______ popular means of transportation again.
A. the; a   B. the; the        C. /; a       D. /; the