Ask HN: What questions do you ask when evaluating an offer with options?

I’m trying to understand how to evaluate offers that include options grants, which I’ve never done before. I’m starting to get a handle on what pieces of data are useful in evaluating their value, but I don’t know what’s common and tactful to ask and what’s generally off-limits. I assume shares outstanding is a pretty common question, but I’m not sure about e.g. info on liquidation preference, purchase price, funding round values, etc. So: what questions do you ask a startup when evaluating their offers?