
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 train, two hours after starting, meets with an accident which detains it for one hour, after which it proceeds at two-thirds of its former rate and arrives 4 hours late. Had the accident happened 120 miles farther along the line, it would have arrived only 3.5 hours late. The length of the trip in miles was:
A) 700
B) 640
C) 560
D) 850
E) 610

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