
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
Consider a sign pyramid where each cell is filled with a "+" or a "-" based on its two cells directly below. Specifically, a cell receives a "+" if the two cells below have the same sign, and a "-" otherwise. Given a pyramid with five levels (thus five cells at the bottom), calculate the number of possible ways to fill these five bottom cells to yield a "+" at the top of the pyramid.
A) 10
B) 12
C) 14
D) 16
E) 18

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