investment type question major, investment, successful, describes

prav_Cfa7

ABC Quarries has recently opened a limestone quarry at a location outside their traaditional service area. Because limestone is a major ingredient in concrete, if the quarry is successful AC plans to build a readymix concrete plant at the same location. The investment in the concrete plant is best describes as:
A. an externality
B. project sequencing
C. a mutually exclusive project
D. an example of investment synergy
Thx in advance