Select the option that will improve the underlined part of the given sentence.
It is wrong to make accusations without will have any proof.

The underlined part needs improvement because the word "without" is a preposition, and prepositions are typically followed by a noun or a gerund (verb + -ing).
The gerund form of the verb "have" is "having". Therefore, "without having any proof" is grammatically correct and meaningful. Other options use incorrect structural combinations.