Final answer:
Pierce Bailey is documenting explicit knowledge by recording concrete customer data from his sales calls, which can be readily transferred and understood by others. There for the correct option is c) explicit knowledge.
Step-by-step explanation:
When Pierce Bailey, a sales executive at a mobile service company, inputs customer contact information, responses of customers, and follow-up actions into a document, he is documenting explicit knowledge. This type of knowledge is well-articulated and formalized, and is communicated in systematic and formal languages. It includes things like manuals, documents, procedures, and anything that can be readily transferred from one person to another.
Since Pierce is recording concrete information and data from his sales calls, this process does not primarily involve tacit knowledge, which would be personal and harder to formalize; nor common knowledge, typically understood by many without need for formal documentation; nor experiential knowledge, which is acquired through personal experiences and practice.