传染期的概念是（）。

A.最长潜伏期与最短潜伏期之间的时间

B.从感染病原体到出现临床症状的时期

C.病人能排出病原体的整个时间

D.从临床症状出现到病原体不再排出的时间

E.从典型临床症状开始出现一直到完全消失的时间

The software development project is not going well. There are over 30 stakeholders, and no one can agree on the project objectives. One stakeholder believes the project can achieve a 30 percent improvement while another believes a 50 percent improvement is possible. The project manager thinks a 10 percent improvement is more realistic. What is the BEST course of action ？（）

A．Move forward with the project and look for more information later to settle the issue.

B．Average the numbers and use that as an objective.

C．Perform a feasibility analysis.

D．Ask the sponsor to make the final decision.