Are Manila clams safe to cook if they're open and don't close when tapped?

I had some live Manila clams delivered from 99 Ranch Market in Southern California, and I was planning to make linguine with clams tonight. Pic below: https://imgur.com/a/OfXgSGk When I unpacked them, I noticed some of the shells were open, and a few had their little foot/tongue sticking out. I read that you're supposed to tap any open clams and see if they close, but the ones I tapped didn't immediately respond. Right now I have them stored in the fridge in a colander over a bowl of ice (so they're not sitting in water), with a damp paper towel over the top. They don't have any bad odor, but I'm wondering if they're still safe to cook. Should I toss any that stay open after tapping, or is it okay to cook them as long as they smell fresh? Any advice would be appreciated. Thanks in advance for any help. submitted by /u/-SpaghettiCat- [link] [comments]