Final answer:
The word that should be capitalized is Dr.
Step-by-step explanation:
The word that should be capitalized in the sentence is Dr. as it is an abbreviation for Doctor and is used as a title before a person's name. Additionally, the name Stevens should be capitalized as it is a proper noun, referring to a specific person. The other words in the sentence - clinic, dog, and and - should not be capitalized as they are common nouns and conjunctions.
Learn more about capitalization in English sentences