The stars at the edges of a galaxy are rotating around the galaxy's center at the same speed as the stars in the middle of the galaxy. How does this provide evidence of dark matter? A. Dark matter provides the gravity that allows the stars to rotate at the same speed.
B. Dark matter emits the light that astronomers need to see the orbital speeds of the stars.
C. Dark matter absorbs light from outside the galaxy, allowing the light of the stars in the galaxy to show the orbital speeds of the stars.
D. Dark matter subtracts gravity, which allows the stars to rotate at the same speed.​

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.