1. which impairment has the biggest difference between the two groups ? a. visual b. hearing c. balance d.loss of feelinge. none of these2. which impairment is the most prevalent among the 70-79 year olds? a. visual b.hearing c.balance d. loss of feeling e. none3. what time period does this study focus on? a. 50s b. 60sc. 70s d. 80s e.none

Figure 3. The prevalence of sensory impairments among persons aged 70-79 years compared with persons aged 80 years and over: United States, 1999-2006 100 70-79 years 80 years and over 88.5 80 69.3 60 Percent 45.4 40 34.3 24.6 24.0 20 16.8 11.0 Visual Hearing Balance Loss of feeling impairment impairment impairment in feet "Significantly different from the 70-79 age group SOURCE: CDCINCHS, National Health and Nutrition Examination Survey