
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
Two swimmers are stationed at opposite ends of a 120-foot pool. One can swim at a rate of 4 feet per second and the other at 3 feet per second. However, the faster swimmer starts 10 seconds after the slower swimmer has started. They continue swimming back and forth for 15 minutes with no time loss at turns. How many times do they pass each other during this period?
A) 36
B) 37
C) 38
D) 39
E) 40

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