Project constraints include: a. time & quality b. scope & costs C. there are not any constraints d. both a &b creates a probability distribution. a. Top-down estimating b. Three Point estimating C. Bottom-up estimating O d. all of the above A project managers responsibilities include: a. developing a project plan b.determining the methodology used on the project C. managing deliverables d. all of the above a. A project sponsor's responsibility(ies) include(s): Communicating the project's goals throughout the organization. b. Contributing to the overall project objectives. C. Documenting the process. d. all of the above