Recently while I watch CRM tutorials I come to this quiz question

Where can we generate new leads from?

1.My Pipeline

2.Team Pipelines

3.Leads

4.Configuration → Lead mining requests

5.All of these answers excepted Team Pipelines

I have checked in v15 - I can find the option "Generate Leads" in all the four Options 

1.My pipeline 2.Team Pipelines  3.Leads  4.Configuration - Lead mining requests

But, The correct answer is 

5.All of these answers excepted Team Pipelines

will someone explain to me why the 5 th option is correct ? I think "all the above" might be correct OR am I wrong

Thanks in Advance!