
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
Nine cards numbered from 1 to 9 were placed face down on the table. Aleksa, Bart, Clara, and Deindra each picked up two of the cards. 

- Aleksa said, "My numbers add up to 6."
- Bart said, "The difference between my numbers is 5."
- Clara said, "The product of my numbers is 18."
- Deindra said, "One of my numbers is twice the other one."

All four statements are true. Which number was left on the table?  
A) 1  
B) 3  
C) 6  
D) 8  
E) 9

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