Final answer:
The tool that uses John Holland's codes to help students find occupations and majors based on personality is the Self-Directed Search Form R: 4th Edition (SDS R). O*NET and Kuder Career Search provide occupation information without directly employing Holland's codes.
Step-by-step explanation:
The student's question asks about tools that use John Holland's codes to assist students in identifying possible occupations and majors based on personality. Among the options provided, the Self-Directed Search Form R: 4th Edition (SDS R) uses these codes explicitly to help individuals understand their personality types and match them to potential career paths and educational pursuits. The Occupational Informational Network (O*NET) is a database maintained by the United States Department of Labor that provides detailed descriptions of occupations, but it is not specifically designed to use John Holland's codes, although it does offer information about the knowledge, skills, abilities, and personal characteristics associated with various occupations. The Occupational Outlook Handbook provides extensive information about different occupations, but it does not directly utilize John Holland's codes. Lastly, the Kuder Career Search with Person Match may suggest professions based on individual assessments, but it is not indicated if it directly implements Holland's codes.