
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 boat travels in a river where the current flows at a speed of 6 mph. The speed of the boat in still water is 18 mph. The boat makes a round trip (going downstream and then returning upstream) over the same distance in both directions. Find the ratio of the average speed for the round trip to the speed in still water.
A) $\frac{3}{4}$
B) $\frac{5}{6}$
C) $\frac{8}{9}$
D) $\frac{4}{5}$
E) $\frac{7}{8}$

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