Which of the following reflects the recommended use of punctuation to join compound words in formal legal writing?

If you aren't sure whether a word should be hyphenated, the best thing to do is look it up in a dictionary like Merriam-Webster.

If you aren't sure whether a word should be hyphenated, the best thing to do is look it up in a dictionary like Merriam - Webster.

If you aren't sure whether a word should be hyphenated, the best thing to do is look it up in a dictionary like Merriam--Webster.

If you aren't sure whether a word should be hyphenated, the best thing to do is look it up in a dictionary like MerriamWebster.

 

Answer with the correct option like 1,2,3,4.