My English professor said that my paper could ____ been better organized and more concise

All else being equal, investments with longer payback periods are preferable

Indicate whether the statement is true or false

Which of the following pair of employee type and HR system is most accurate?

a. Contract worker and alliance partnership b. Job-based and productivity-based system c. Core employee and productivity-based system d. Job-based and compliance-based system e. Contract worker and collaborative-based system