
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
Given the relationship $t = 15s^2 + 5$, find $s$ if it is known that $t = 20$.
A) $s = 1$  
B) $s = -1$  
C) $s = 0$  
D) $s = \pm 1$

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