
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 class of 60 students, each is either red-haired or black-haired and has either green eyes or grey eyes. If there are 20 green-eyed red-haired students, 35 black-haired students, and 25 grey-eyed students, what is the number of grey-eyed black-haired students?
A) 15
B) 17
C) 20
D) 22
E) 25

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