In this scenario, the replication of bacteria can be seen as a relationship between time and the number of bacteria present at any given moment. Since for each time point (every 14 minutes), there's a specific number of bacteria, it's a consistent and predictable outcome.
This scenario represents both a relation (as it connects time to the number of bacteria) and a function (because each input of time corresponds to exactly one output of bacteria count).
Therefore, the correct answer is: B. both a relation and a function.