Choice A.
A correction to B would be "I can't wait to see Ireland!" A correction to C would be to replace the semi colon with a comma A correction to D would be to replace the colon with a semi colon or a hyphen.
The correct answer is a.
None of the choices are perfectly punctuated; however, option A is the least incorrect as it only requires a comma instead of a semicolon. The other options have issues with colons and punctuation in connecting clauses. If you must choose, select option A as it maintains a clearer meaning despite its error.
;