You work at a leading healthcare firm developing state-of-the-art algorithms for various use cases. You have unstructured textual data with custom labels. You need to extract and classify various medical phrases with these labels. What should you do?

A. Use the Healthcare Natural Language API to extract medical entities B. Use a BERT-based model to fine-tune a medical entity extraction model C. Use AutoML Entity Extraction to train a medical entity extraction model D. Use TensorFlow to build a custom medical entity extraction model