
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
A bag contains 800 balls. Initially, 70% of the balls are red, and the rest are blue. How many red balls must be removed so that 60% of the remaining balls are red?
A) 150
B) 200
C) 250
D) 300
E) 350

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