I believe the general rule when using "or" is to place the plural subject last and use a plural verb. But I've also heard that you just match whichever subject comes last. While either are partially true, I prefer to stick with the first rule.
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tamguatlayWhen a singular noun and a plural noun 1 is/are joined by or, the verb agrees with the 2 nearer/nearest noun.1 has to be "are".