A school district experienced a cyberattack that disrupted the district’s websites and affected its online learning programs, grading, and email systems. The district announced schools would be closed for a specified period and advised students to avoid using Windows-based devices. The district’s decision to close the schools, under those unanticipated conditions, can be classified as a(n):

A. incremental decision.

B. nonprogrammed decision.

C. programmed decision.

D. discontinuous decision.