# How to appropriately link to a resource that answers OP's question?

So I recently came across this question, where the OP asks for a proof of the uniform convergence of a certain sequence, and I happen to have a link to some lecture notes which contain a detailed proof of (a slightly more general version of) the result the OP asked about.

I now wonder what is MSE's community consensus on the appropriate course of action to take in this situation : From the related Meta posts I've found (post 1, post 2), it seems that giving an appropriate link with enough context is acceptable as an answer, or otherwise as a comment. I am just not really clear of what amount of context would be deemed as "enough".

I thus ask, out of these options, which one would be considered best ? :

1. Writing as a comment :

you can find the detailed proof of this result on page 2 of these lecture notes [link to lecture notes]

1. Writing as an answer :

The detailed proof of this result can be found on page 2 of these lecture notes [link to lecture notes].
The idea of the proof is to [explanation of the proof main ideas e.g. : "cover the compact set $$\Theta$$ by a finite number of balls of radius $$\varepsilon$$, then use the union bound over these balls together with WLLN and continuity arguments to get your result"]

1. Writing as an answer :

The detailed proof of this result can be found on page 2 of these lecture notes [link to lecture notes]. In order to make this answer self-contained, I reproduce the proof (not mine) below :
[detailed proof of the result as in the linked lecture notes]

To me, option 1 does not make sense : the linked resource effectively answers the question, so it has to be given as an answer. However I feel like a case could be made for both options 2 and 3 (or even others I haven't considered), so I would like to know the community's consensus on this.