Analyze the following statements about the excerpt “The only time you might be able to set foot on this metaphor for neutrality is during the swap” (l. 22-23):

I. The word “might” suggests a possibility.
II. The verb immediately after “might” is in its base form because it follows a modal verb.
III. The word “might” can be replaced by “must” with no significant changes in meaning.

Which ones are correct?