The correct answer is: a. a programmed decision.
A programmed decision is a routine and repetitive decision that follows established guidelines, rules, or policies. In this scenario, Colleen's decision to suspend the shift employee for violating the company's policy on absences (more than three absences in a six-month period) falls under a programmed decision. The policy provides clear guidelines for handling such situations, making it a routine and pre-established decision process.