i can do it.. ?

you just did a quiz..
then people started asking you, "how was the quiz ?"
and you answered, "it should be okey, i can do it.."

the question now, is it because..
- you yourself can do it ?
- you somehow got lucky studied the exact problems a day before ?
- your friend helped you out doing the quiz ?
- 'divine' help ?
- you had bribed your lecturer(s) a week ago ?
- you know your classmates didn't do well in it ?
- the quiz turned out too easy ?
- you mastered the topic since 5 years ago ?
- you cheated ?
- the lecturer's cued you at the quiz ?
- your friend enlighten you previously ?
- it's absolutely the same questions as last week's tutorial ?
- you studied very hard earlier ?
- you sucessfully predict sort of the questions ?

or.. ? you tell me.. !!
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