
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
In a 100-foot swimming pool, two swimmers start at opposite ends. One swims at 4 feet per second, and the other at 3 feet per second. They swim back and forth non-stop for 20 minutes. Assuming no time is lost on turns, find the number of times they pass each other.
A) 160
B) 171
C) 178
D) 185
E) 192

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