A machine learning team is adapting a large, pre-trained language model for a specialized medical text summarization task. They have two potential datasets for this adaptation process:

• Dataset A: 5 million general medical articles of mixed quality and relevance.
• Dataset B: 20,000 high-quality summaries of medical articles, written and verified by expert physicians.

Analyze the two datasets and justify which one is the more strategic choice for the team's goal. In your justification, explain the relationship between data quantity, data quality, and this specific phase of model development.