Based on your reading of the following passage, which listed career is the most responsible position for which Isaac may be qualified?
Isaac is a high school graduate and also has a college degree in
engineering. He is smart and ambitious and has good technical skills. He
can operate computers, and has a strong grasp on basic physical
sciences. He served in the navy for four years. He does not yet have a
spouse or any children. Isaac is physically healthy, strong, and has good
vision without any significant issues.
ca seaman
ca rail yard worker
ca ship's captain
ca dispatcher