to
against
into
for
Answer is Wrong!
Answer is Right!
The correct answer is B. against.
The phrase “up against” means “to be in opposition to someone or something”. In this case, Saddam Hussein was in opposition to George W. Bush.
The other options do not make sense in the context of the sentence.
- A. to does not make sense because it does not convey the idea of opposition.
- C. into does not make sense because it does not convey the idea of opposition.
- D. for does not make sense because it does not convey the idea of opposition.
Therefore, the correct answer is B. against.