You did not provide any options for me to choose from. Please provide the list of options so I can help you determine which might be evidence for an extrasolar planet.

For example, some possible options could be:

* Doppler shift of a star's light

* Transit of a planet across a star's disk

* Astrometry (measuring a star's wobble in space)

* Gravitational microlensing

* Direct imaging of a planet

Once you provide the options, I can tell you which ones are evidence for an extrasolar planet and explain why.