
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
The school invites 6 out of 10 students to participate in a study seminar, among which students A and B cannot attend at the same time. The number of different ways to invite is (   )  
A  70　　　　　B  280　　　　　C  139　　　　　　D  140

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