
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Compute the value of the following expression:
\[
\dfrac{20-19+18-17+16-15+14-13+12-11+10-9+8-7+6-5+4-3+2-1}{1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16+17-18+19-20}
\]
A) -2
B) -1
C) 0
D) 1
E) 2

Present the answer in LaTex format: \boxed{Your answer}
user