—Why was he late for school?

— ________his bike was broken on the road.

A．Since

B．Because

C．As

D．Because of

记录软件开发工具使用的详细过程情况，将使项目的组织者及时地清楚地知道开发工具的使用情况、______________的情况以及人们是否正确地使用了它们。