1. International Foundation for Digital Competences. (2017). VeriSM™: A service management approach for the digital age. Van Haren Publishing.
Page 31, Section 3.4 The changing role of IT: The text explicitly discusses "shadow IT," stating, "In the past, many organizations have tried to prevent ‘shadow IT’, where parts of the business buy their own IT solutions... VeriSM recognizes that in the digital age, this is no longer a realistic or even a desirable approach. Instead, the capabilities of the organization need to be harnessed and supported." This directly aligns with the definition of implementing solutions without explicit organizational endorsement.
2. Winkler, T. J., & Brown, C. V. (2014). Governing and Managing Shadow IT. MIS Quarterly Executive, 13(3).
Page 132, Section: What is Shadow IT?: The article defines Shadow IT as "IT devices, software, and services outside the ownership or control of IT organizations." This academic definition corroborates that the core of the concept is the lack of official endorsement and control, as stated in option C.