Answer: September 2017
Step-by-step explanation:
From the question, we are informed that an initial license is issued in October of 2015. One thing that we need to understand is that the license will only be effective for two years.
So, before it expires it is logical to renew it. In this scenario, since the initial license is issued in October 2015, this means that it'll be renewed in 2 years which will be September 2017.