Which is correct?

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MicrosoftInternetExplorer4

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All I’d promised Daniel was twenty-four minutes.

or

Normal 0

MicrosoftInternetExplorer4

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All I’d promised Daniel were twenty-four minutes.

I keep going back and forth on this.  Since the promise itself is in regards to the number of minutes, it would be "were" right?  Or is that wrong? 

If I were to extend the sentence, it would say, ... twenty-four minutes of my time. 

Does that make a difference in how it reads?  Ack!