
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
One third of the people in a room left. One fourth of those remaining started to dance. There were then $15$ people who were not dancing. Find the original number of people in the room.
A) 24  
B) 28  
C) 30  
D) 36  
E) 40

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