
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
A sequence of squares is made of tiles where each is constructed as follows: the side of each square is one tile longer than the side of the previous square, and in addition to the tiles forming the square, there are an extra $2n$ tiles attached along one edge, creating an extended area. If the construction pattern for squares continues, how many more tiles does the eighth square require than the seventh?
A) 15
B) 16
C) 17
D) 18
E) 19

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