searching for a job electronically has become a common, but not always fruitful approach. searching for a job electronically has become a common, but not always fruitful, approach. searching for a job electronically has become a common but not always fruitful, approach.

All nouns, verbs, adjectives, proper nouns, and verb tenses should be capitalized, along with the first letter of each. Accordingly, you should capitalize articles, conjunctions, and prepositions that are longer than five letters. However, some style manuals advise against doing so.
At least one capital letter should begin each sentence, and it should end with a full stop, an exclamation point, or a question mark. The sentence's completion is signaled by this simple mechanism. a full stop, or the comma.
Accordingly, you should capitalize articles, conjunctions, and prepositions that are longer than five letters. However, some style manuals advise against doing so.

The complete question is,

Which of the following sentences has the proper punctuation?

Electronic job searching has become a popular, albeit occasionally unsuccessful, method.

While increasingly popular, electronic job searching is not always successful.

Electronic job hunting has become a popular, albeit not always successful, method.

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