Which revision corrects the dangling modifier in this sentence? Strolling on the boardwalk, the whale suddenly breached.
1 Strolling on the boardwalk, the whale was breaching.
2 The whale was suddenly breaching, strolling on the boardwalk.
3 The whale suddenly breached strolling on the boardwalk.
4 While we were strolling on the boardwalk, the whale suddenly breached.