Final answer:
The best sentence indicating the author's positive attitude towards blues artists is the one highlighting their thriving presence and tributes to past great musicians.
Step-by-step explanation:
The sentence that best conveys the author's attitude toward the topic of the passage is likely: "Today, blues artists continue to record and thrive as composers and performers, and they often pay tribute to the great men and women of the country and classic blues eras by singing and recording their amazing, timeless songs."
This sentence reflects an appreciative and positive tone towards the enduring legacy and contribution of blues musicians. It emphasizes the continued relevance and homage to the past, indicating a respect for the historical impact of these artists.