
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 still water at a speed of 10 mph. When it enters a river with a current of 3 mph, it travels a certain distance downstream and then returns upstream. The ratio of the average speed for the entire round trip to the boat's speed in still water is?
A) $\frac{10}{9}$
B) $\frac{91}{100}$
C) $\frac{95}{100}$
D) $\frac{85}{100}$
E) $\frac{90}{100}$

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