Final answer:
The terms provided don't directly relate to types of assignments in business or legal sense. Retrospective and prospective are types of studies in research methodology, with the former analyzing past data and the latter following outcomes from start to finish.
Step-by-step explanation:
The question references two types of assignments typically discussed in a business or legal context. However, the provided options (A. positive correlation; negative correlation, B. negative correlation; positive correlation, C. retrospective; prospective, D. prospective; retrospective) are not directly related to types of assignments in the usual legal or business sense. Instead, these options pertain to types of relationships (correlations) in statistics (A and B), or types of studies in research methodology (C and D).
If the original question is regarding research methodology in a business context, then the two types of studies are C. retrospective and D. prospective. A retrospective study looks back at data collected in the past, while a prospective study looks forward, tracking outcomes as they happen after the study design is set and the study begins.