该公司应决策投什么性质的标？

A. 碳素结构钢
B. 低合金结构钢
C. 特殊性能低合金高强度钢
D. 特殊钢

A. Many countries have not taken measures to create enough jobs。
B. Few countries know how to address the current economic crisis。
C. Few countries have realized the seriousness of the current crisis。
D. Many countries need support to improve their people’s livelihood。