B I think is the correct one
I'm not for sure on this, but I'd say it's because the people in The Alamo are outnumbered and out trained by the Mexican army.
Forming a new nation (1784-1819) As a result of the Treaty of Paris of 1783, the new nation controlled all of North America from the Atlantic Ocean to the Mississippi River between Canada and Florida. The original 13 colonies made up the first 13 states of the United States. ...
If the price of Sprite increases, the demand for a substitute good like 7-up will increase too, because people will seek for a substitute product to replace Sprite.
<u>Law of demand</u> explains the higher the price of a good, the less people will demand it (or avoid it), and will seek others to replace it.