
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 modified sequence of numbers where each integer $n$ appears $n$ times in the list for $1 \leq n \leq 150$, and there is an additional number 1000 appearing once. Determine the median of this list.
A) 105
B) 106
C) 107
D) 108

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