Questions

Viruses are responsible for some of the most dangerous and deadly diseases including influenza, ebola, rabies and smallpox.

Despite their potential to kill, these potent pathogens are in fact considered to be non-living.

Reasons:

1. Viruses don't have any cells, like living organisms do. They have protein coats but no organelles or other cellular machinery. Just a little DNA packet.

2. Viruses can't produce new proteins, DNA, or RNA and therefore are unable to reproduce on their own. They need infected cells' machinery to make all of these and produce new virons.

3. Viruses have no metabolic activity. They don't use or convert energy and have no ongoing interior processes. They're basically just inert structures until they impact a potential host cell.

Answer A is reversed. Answer C is sometimes mistakenly used to forecast project completion (it’s invalid because it does not take into consideration which completed tasks are on the critical path). Answer D is the definition of Schedule Variance. 

“The work involved in performing the five processes of Project Scope Management is preceded by a planning effort by the project management team. This planning effort is part of the Develop Project Management Plan process, which produces a scope management plan that provides guidance on how project scope will be defined, documented, verified, managed, and controlled. The scope management plan may be formal or informal, highly detailed, or broadly framed, based upon the needs of the project.”