
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
Let \(a\), \(b\), \(c\), and \(d\) be positive integers with \(a < 3b\), \(b < 4c\), and \(c < 5d\). If \(d < 150\), the largest possible value for \(a\) is
A) 8900
B) 8924
C) 8939
D) 8964
E) 8970

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