Who has the PRIMARY responsibility to solve this problem?

A project manager for a small construction company has a project that was budgeted for US $130,000 over a six-week period. According to her schedule, the project should have cost US $60,000 to date. However, it has cost US $90,000 to date. The project is also behind schedule, because the original estimates were not accurate. Who has the PRIMARY responsibility to solve this problem?

A.
Project manager

B.
Senior management

C.
Project sponsor

D.
Manager of the project management office