In accordance with the Bernoulli principle, as the water get In the narrow region, its gains speed and the bubbles are larger.
The concept explains that an increase in a liquid's speed creates a pressure decrease and decrease in a liquid's speed creates a pressure increase.
Hence, as the water get In the narrow region, its gains speed and the bubbles are becoming larger because of the pressure.
Therefore, the Option C is correct.
Missing options "same size, smaller, larger"
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