ASAP PLEASE HELP M 20 POINTS SCIENCE What are two claims based on science?
A. Many people worry that increased global temperatures will couse their businesses to lose profits.
B. The data gathered from seaside laboratories around the world show that global sea levels have risen.
C. Earth's temperature must be rising, because winter sports are less popular than in the past.
D. Temperature measurements show that many climates are warmer than they were in the past.

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speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.