Read the following sentences.

have you gotten a chance to read my rough draft yet? i was just wondering—

which of these correctly edits the sentences to reflect a thought that trails off?

have you gotten a chance to read my rough draft yet . . i was just wondering.
have you gotten a chance to read my rough draft yet? i was just wondering . .
have you gotten a chance to read my rough draft yet—i was just wondering.
have you gotten a chance . . to read my rough draft yet? i was just wondering.