
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
William has four cards with different integers written on them. Three of these integers are 2, 3, and 4. He puts one card in each cell of the $2 \times 2$ grid shown. The sum of the two integers in the second row is 6. The sum of the two integers in the second column is 10. Which number is on the card he places in the top left cell?

A) 2  
B) 3  
C) 4  
D) 6  
E) Can't be sure

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