Final answer:
The text provided does not indicate that Tyler is preparing to join the Marine Corps, but rather the Navy, due to his enrollment in the Navy ROTC program and desire to become a surface warfare officer.
Step-by-step explanation:
The passage indicating that Tyler is preparing to join the Marine Corps does not appear to be present in the text given. Tyler has enrolled in the Navy ROTC program which suggests affiliation with the Navy, and his aim to become a surface warfare officer further aligns with the Navy career path, not the Marine Corps.
The ROTC program is designed to train officers for various branches of the U.S. military, including the Army, Navy, and Air Force. Each branch has its specific ROTC program: Army ROTC, Navy ROTC (which includes Marine Corps options), and Air Force ROTC.
Since Tyler is interested in being commissioned as a surface warfare officer, a role specific to the Navy, it indicates that he is preparing for a career in the Navy rather than the Marine Corps.