Final answer:
WHMIS 1988 will be phased out completely by the year 2025.
Step-by-step explanation:
The correct answer is A. 2025. WHMIS 1988, which stands for Workplace Hazardous Materials Information System, is a set of standards for labeling and classifying hazardous materials in Canada. However, it is being phased out and replaced by WHMIS 2015. The transition period allowed for the use of both WHMIS 1988 and WHMIS 2015 systems, however, WHMIS 1988 will be phased out completely by 2025. The transition period for WHMIS 2015 began in 2015 and will continue until 2023. After this transition period, WHMIS 1988 will be completely phased out by 2025.