What are the push and pull factors of Mariel's boat lift

The sun a. will become a red giant within two to three million years b. is in its main sequence, which willlast thousands of years c. is in its main sequence, which will last billions of years. d. will explode as a supernova after its main sequence

If you think a piece of information will be on an upcoming test, you should always write it in your notes.

Can someone make a thesis statement out of this? some historians have called the civil war and reconstruction period a “second american revolution.”