$18)$ The financial model that measures the time it will take to recover the project investment is the $\_\_\_\_\_\_\_\_\_\_$ model.

A$)$ break through

B$)$ recovery

C$)$ threshold

D$)$ investment

E$)$ payback

$19)$ In classifying the kinds of projects an organization has in its portfolio, projects that directly support the organization's long$-$term mission are $\_\_\_\_\_\_\_\_$ projects.

A$)$ Strategic

B$)$ Conformance

C$)$ Compliance $($must do$)$

D$)$ Operational

E$)$ Sacred cow

$20)$ In classifying the kinds of projects an organization has in its portfolio, projects that are typically those needed to meet regulatory conditions required to operate in a region are $\_\_\_\_\_\_\_\_\_\_\_$ projects.

A$)$ Strategic

B$)$ Conformance

C$)$ Compliance $($must do$)$

D$)$ Operational

E$)$ Sacred cow