Table 4-5
The table below shows the quantities demanded of cases of Mt. Dew per month by four families at various prices. 
-Refer to Table 4-5. Which of the following could cause all four families to demand more Mt. Dew at all prices?
Definitions:
Sea of Japan
A marginal sea between the Japanese archipelago, the Korean Peninsula, and Russia.
Persian Gulf
A shallow marginal sea of the Indian Ocean that lies between the Arabian Peninsula and Iran, known for its strategic and economic importance due to its oil reserves.
Back-arc Basin
A geological feature located behind a volcanic arc, formed by the stretching and sinking of an oceanic plate.
Trench
Long, narrow, and deep depressions on the ocean floor, often occurring at the boundaries between tectonic plates.
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