Question

based on the graphic comparing beach closures due to the tijuana river sanitation pollution to closures due to other sources of sanitary sewer overflow (sso), which of the following statements is true?
over the years, the tijuana river pollution’s contribution to the closures decreased
the graphic does not reveal an accurate representation of the sewage pollution problem
the source of the beach closures is equally attributed to the tijuana river and to other sources, sso.
in the year 2002, the tijuana river–related closures were slightly less than the sso closures.
source: courtesy of the county of san diego, ca, san diego county 2006 beach closure and advisory report

Explanation:

To determine the correct statement, we analyze each option:

• Option 1: The graph doesn't show a clear decreasing trend for Tijuana River pollution's contribution over the years (e.g., 2000 - 2006 has varying patterns), so this is false.
• Option 2: The graph's segments (different colors) likely represent different pollution sources, but it's designed to show proportions, so it can give an accurate representation of sewage pollution (relative to other sources) over time. Thus, this is false.
• Option 3: For equal attribution, the two segments (Tijuana River and SSO/other) should be roughly equal in height for most years, but the graph shows varying proportions, so this is false.
• Option 4: In 2002, the Tijuana River - related closure segment (purple, 45%) is slightly less than the SSO/other segment (green, remaining ~55%), so this matches the graph.

Answer:

In the year 2002, the Tijuana River - related closures were slightly less than the SSO closures.