In agriculture-based countries -- home to 417 million rural people, 170 million of who live on less than ＄1 a day -- the agricultural sector is essential to overall growth, poverty reduction, and food security. Most of these countries are in Sub-Saharan Africa, where the sector employs 65 percent of the labor force and generates 32 percent of GDP growth.

动作脚本2.0类别定义的文件扩展名是（）

A、AS

B、ASR

C、FLP

D、ASC