Answer: 94
Step-by-step explanation:
Standish groups are the collection of researcher who are indulged in studying and analyzing performance of software models.This research group studies about the software project in depth and tries to improve the processing .
According to Standish group research,94% of software models are usually challenged or has some drawback in its structure or operations.Thus, failure of project is highly seen in research done by Standish group and thus they provide improvement measure to the software organizations.
Other options are incorrect because 23%, 78% or 475 are low rate of failure which doesn't occur in software model assessment done by Standish group.Thus. the correct option is 94%