The daughter theory was favored for a while, but it was realized that the Earth would have had to spin ridiculously fast to successfully eject the moon material.  Plus, it would have also been unlikely that it could have had that much momentum and then still ended up in stable orbit.

The sister theory was rejected when the composition of the Earth and Moon were compared.  They’re different enough that the theory seemed unlikely.

The captive theory seemed unlikely because of how difficult it would have been for the Earth to have captured the Moon.  In simulations, it only worked out when the moon and Earth collided.  Also, there are also a lot of similarities between the Earth and moon, which the theory doesn’t account for.

The fender bender theory is that a small-ish planet hit Earth while it was still molten, so the material from both were sent into the orbit and slowly formed the moon.