
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
Angelina drove at an average speed of 70 km/h and then stopped for 30 minutes. After the stop, she drove at an average speed of 90 km/h. In total, she drove 300 km in a total trip time of 4 hours including the stop. Which equation could be used to solve for the time $t$ in hours that she drove before her stop?
A) $70t + 90(4 - t) = 300$  
B) $70t + 90(3.5 - t) = 300$  
C) $70t + 90(t - 3.5) = 300$  
D) $70(3.5 - t) + 90t = 300$  
E) $70t = 300$

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