
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
When Cheenu was a young man, he could run 20 miles in 4 hours. Many years later, he can now walk 12 miles in 5 hours, including a total of 30 minutes of rest time. How many minutes longer does it take for him to walk a mile now, compared to when he was younger?
A) 9 minutes
B) 10.5 minutes
C) 12 minutes
D) 15 minutes
E) 18 minutes

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