Sierra nevada pale ale clone fermentation

Brewed last Sunday at a OG of 1.052. No signs of airlock activity after a week and yes I know that doesn't necessarily mean anything. I pitched the wlp001 with no starter at ~75* :-/
Should I....
A) crack open and take a gravity reading and risk oxidation
B)add a pack of Us 05
C) wait it out and let it do it's thing
Thanks!

After a week is a good wait.

I'd vote A 1/2) Open and look for signs of fermentation (krausan ring, yeast floaties, bubble film, etc.) If yes, close lid and C. If no, A. (Minimal risk of oxidation-- no more than you are going to do when it's done) If reading is lower than o.g. C. If reading is same as o.g. B)

At least that's what I think. Others?

i agree with woozy.
take the gravity reading, oxidation risk is extremely minimal. if you don't stir it up you're not adding oxygen. if there's a krausen ring, you really don't need to worry. taste it, smell it...no rotten eggs or other nastiness and you're probably fine.

If there is no krausen ring and gravity has not changed should I aerate before repitching

I'm assuming you're in a bucket. I usually will put a strong flashlight up to the lid (pointing down) and can see the kreuzen ring (if it is there) without opening the lid. I'd do that, then at least I would know if fermentation happened.

I am in a bucket and I just did your trick by looking under a blanket with my iPhones LED light shining through and I see krausen ring!
Must have just been a leak I guess?
It' didnt get as tall as my IIPA right next to it but I think that's just due to higher alcohol + white labs San Diego super yeast. I just cracked the IPA open to dry hop right into the primary and there were yeasties floating around but looks healthy and smells great

Sounds good. I think every yeast acts different, and every recipe, and the temp will affect it as well. I've got 2 buckets with the same brew that had different sized kreuzen rings, even with the same yeast, same temp, and same recipe. I guess i'll have to wait to see if they taste any different, but when I dry hopped the other day they both smell awesome.