Final answer:
The code segment that works as intended to print the word Hello is I. System.out.print("Hello");.
Step-by-step explanation:
The code segment that works as intended to print the word Hello is I. System.out.print("Hello");. This code segment uses quotation marks to enclose the word Hello, indicating that it is a string literal and should be printed exactly as it appears. In contrast, code segment II System.out.print(Hello); would throw an error since Hello is not declared as a variable or a string. Code segment III System.out.print(He);System.out.print(llo); would print He followed by llo on separate lines, not the word Hello.