What makes venus the hottest planet among the planets in the solar system it is the test because of the A. frozen ice and dust in its atmosphere
B. presence of hydrogen and helium in the atmosphere
C. dense clouds of carbon dioxide that causes the greenhouse effect
D. comets meteor asteroids and other heavenly bodies in the solar system​

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

Which of the following is an effect that constantine's conversion to christianity had on the roman empire?

After ww2, the soviets began setting up what type of governments in countries closest to them