We're still talking about a Cloze sub-question that simulates a Kprime question, right? In this case, it is trivial to simulate the "Subpoints" scoring option since, in the Cloze question, subpoints are assigned to each correct answer. The "Kprime" and "Kprime 0/1" scoring options would be more difficult to simulate.
With the simulated subpoints scroring option, if you have four choices, the question will count for a minimum of four points since in the Cloze question, each question counts for a minimum of 1 point. An incorrect answer will give 3 points, two incorrect answers will give 2 points, three incorrect answers will give 1 point and 4 incorrect answers will give 0 points.
I have prepared a second example with the scoring scheme you want. You can try it here ↗ (scroll down to the second example). This example just demonstrates that a JavaScript workaround is tedious, if not impractical, and should probably not be considered. Note that in addition to having to adjust the grade in the info block, the grade must also be adjusted in the grade book. Also, if there are other questions in the quiz, adjusting the grades in the gradebook becomes practically impossible.
So you would have to consider a more solid solution, i.e. modifying the PHP code of the cloze question, which I don't want to venture into and which I think you shouldn't venture into either, unless your scoring scheme is absolutely necessary.
