Meaning of off-hand

[Rich7]

Test No. incompl/inter-95 "Letter of Complaint (2)", question 8

who were most ......... hand

(a) to
(b) in
(c) by
(d) off

Test No. incompl/inter-95 "Letter of Complaint (2)", answer 8

who were most off hand

Correct answer: (d) off

Your answer was: incorrect
who were most in hand
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I don't get it? off hand here means?

[Torsten]

Those people in technical support weren't well prepared for their job. They couldn't answer any questions or give advice.
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