
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
The price of a product was $100$ dollars at the beginning of January. During January, the price increased by $x\%$. In February, the price decreased by $10\%$. In March, it rose by $20\%$. Finally, in April, it decreased by $15\%$. At the end of April, the price of the product returns to $100$ dollars. What is the value of $x$?
A) 5%
B) 7%
C) 9%
D) 12%
E) 15%

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