Final answer:
The element of a handicap accessible bathroom is the insulation of hot water and drain pipes to prevent contact burns (option C). This is in line with the requirements of the Americans with Disabilities Act (ADA) which mandates such modifications for accessibility.
Step-by-step explanation:
The element of a handicap accessible bathroom from the options provided is C) Hot water pipes and drain pipes must be insulated against contact. This is a safety requirement to prevent burns or injuries to individuals who might have difficulty moving away from hot surfaces quickly. Elevated countertops, wooden flooring, and scented air fresheners do not specifically address accessibility concerns for individuals with disabilities, whereas insulation of pipes is a direct measure to ensure accessible and safe use of the bathroom for all individuals, including those with disabilities.
According to the Americans with Disabilities Act (ADA), accommodations such as sidewalk ramps and Braille signs are examples of making environments accessible for people with disabilities. Before the ADA's passage in 1990, the lack of such accommodations resulted in the exclusion of disabled individuals from several opportunities. The ADA requires various modifications to public spaces to make them accessible, including in bathrooms.