
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, starting at opposite ends of a 100-foot pool, begin swimming towards each other. Swimmer A swims at a rate of 4 feet per second, and Swimmer B swims at 5 feet per second. They continue to swim back and forth without any time lost on turns for a period of 30 minutes. Calculate the number of times they pass each other.
A) 52
B) 53
C) 54
D) 55
E) 56

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