Final answer:
The author uses the subject-by-subject comparison strategy in the passage.
Step-by-step explanation:
The author uses the subject-by-subject comparison strategy in the passage. This can be seen in the way the author discusses the history, taste profile, health properties, and caffeine content of both coffee and tea separately, without directly comparing the two. By presenting the information in this way, the author allows the reader to understand each subject individually before making any comparisons. A run-on sentence is a sentence in which two or more complete sentences are not separated by any punctuation. In this case, the sentence contains multiple independent clauses without proper punctuation or coordination.