Which one of the following sentences is punctuated correctly.
A. I saw so many of my friends, that I knew from high school.
B. Work was especially hard today,I had to train someone new to the job.
C. I often carry a cell phone with me, it helps if someone is trying to reach me.
D. If I had arrived earlier, I wouldn't have missed the opening act.
http://grammar.ccc.commnet.edu/grammar/commas.htm
http://grammar.ccc.commnet.edu/grammar/runons.htm
http://grammar.ccc.commnet.edu/grammar/runons.htm#splice
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B. Work was especially hard today,I had to train someone new to the job.
The correct sentence with the proper punctuation is C. "I often carry a cell phone with me, it helps if someone is trying to reach me."
To explain how to get the answer, you can refer to a reliable grammar resource like the Purdue Online Writing Lab (OWL) at http://owl.purdue.edu/
Let's analyze each option:
A. "I saw so many of my friends, that I knew from high school."
This sentence is incorrectly punctuated. The comma after "friends" suggests a comma splice, which occurs when two independent clauses are incorrectly joined together with only a comma. To correct this, you could use a semicolon or separate the clauses into two separate sentences.
B. "Work was especially hard today, I had to train someone new to the job."
This sentence is also incorrectly punctuated. It starts with an independent clause, followed by a comma splice. To correct this, you could use a semicolon or create two separate sentences.
C. "I often carry a cell phone with me, it helps if someone is trying to reach me."
This is the correct sentence with proper punctuation. The comma is used correctly here to separate the main clause and the dependent clause.
D. "If I had arrived earlier, I wouldn't have missed the opening act."
This sentence is correctly punctuated. It is a conditional sentence with a dependent clause followed by the independent clause.
To confirm the correct punctuation rules, you can refer to the Purdue OWL website on commas (http://owl.purdue.edu/owl/purdue_owl.html) and run-on sentences (http://owl.purdue.edu/owl/purdue_owl.html). These resources provide comprehensive explanations and examples on how to use commas correctly and avoid run-on sentences.