I prefer cats _____ dogs

[stefan_kar]

Which is the best:

a) than
b) to
c) over
d) all of the above
e) other

[Offroad]

I go for "to", b)

[Mehrgan]

I prefer cats to dogs.
Look, for Nouns and Gerunds, we use "To" in between...while for verbs we use "Rather than",
So: I prefer cats to dogs.
I prefer feeding cats to walking dogs.
I prefer to feed cats rather than (to) walk dogs.
Hope this helps...

[stefan_kar]

Great answers, thank you both!

[stefan_kar]

Just a question, are the other options wrong, or are they just less used?

[engee30]

Just a question, are the other options wrong, or are they just less used?

Over is another possible option.

[Mehrgan]

Just a question, are the other options wrong, or are they just less used?

You're welcome mate,
As far as you're considering standard English this is your only option...

[Mehrgan]

As engee30 mentioned that's another option (But not accepted as an standard/grammatical form) Tnx to engee30 too...

[Barb_D]

I'm not convinced that preferring something over something else is not standard. There are more than 30 million hits for that on Google. There are more than 60 million with to -- but with 30 million, I think we need to accept that over is accepted!

{not a teacher}

[konungursvia]

Rather than, to, over... all are heard.