Which of the following correctly describes where early earth's water came from?

a. rains from violent storms created oceans

b. ice on mountainous structures melted

c. collisions between earth and stars released water

d. carbon in earth's crust converted into water vapor that was then condensed

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

gold i'm pretty sure i might be wrong

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

c should be the answer