The candidate's solution correctly identifies that a machine learning algorithm would be the best solution for this problem. However, the candidate does not provide any details on what type of machine learning algorithm could be used or how it could be trained. Additionally, the candidate does not mention any possible issues that could arise with this approach.
The candidate's solution is correct and demonstrates a good understanding of the problem. The candidate has correctly identified that K-means clustering is the best algorithm to use for this problem and has correctly identified that two clusters are required.
The candidate's solution is correct and demonstrates a level of completeness. The candidate has correctly identified the problem and proposed a solution that would solve it. The candidate's approach is sound and their solution is efficient.