Option 4 is good, except that ignoring racial information would violate the VRA, as it should (for a host of reasons). So all the options are a fail.
Not necessarily. Non partisan drawings of boundaries are usually based on geography and communities of interest, so the 'communities of interest' part might ensure majority minority districts.
Of course, the VRA has been abused by Republicans to make districts far more majority minority than they need to be in order to pack the minorities into as few districts as possible, unfortunately, frequently with the consent (and sometimes the assistance) of the Democratic Representatives of those districts.
The option 4 says you don't have any racial information, and many contiguous minority communities span jurisdictional lines, so as I say, it is a fail. You draw minority CD's when otherwise required by law, and do so in a way that otherwise hews to good redistricting principles. See the Muon2 rules for details. As a practical political matter, more minority CD's will be drawn than required by law, and the way to do that, is draw the additional minority CD's, if, and only if, both major parties agree to do so, and again, it is done in a way that otherwise hews to the maximum extent possible to good redistricting principles.