Much of this success is                     the work of students, and                      the support from teachers.[ ]

A. because, of

B. because of, with

C. because of, within

第一次受限股中首次公开发行前股东持有股份超过5%的股份在股改结束12个月后解禁流通量为10%，其后成为全部可上市流通股。( )