Which statement correctly defines a split infinitive?

1. AAn adverb comes between 'to' and the verb
2. BAn adjective comes between 'to' and the verb
3. CAn adjective comes before a bare infinitive
4. DAn adverb follows a to-infinitive

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: A. An adverb comes between 'to' and the verb

Explanation

'To boldly go': the adverb splits the to-infinitive.