Repetition usually tells us that the someone wants a large emphasis on this word: that it has a significant meaning to them, and/or possibly the whole tale itself.
The sentence showing correct punctuation is Sentence 3. Since "girl" is a singular noun, the possessive form should be "girl's".
Sentences 1, 2 and 3 show incorrect representation of a singular possessive noun. The appropriate to use on these sentence is "girl's".
<span>a. “A total of 820,151 legal induced abortions were reported in 2005, the abortion ratio (number of abortions per 1,000 live births) was 233, and the abortion rate was 15 per 1,000 women aged 15--44 years.” - (www.cdc.gov)
This use of statistics is the most effective because it presents the information clearly and accurately, and cites a well known, credible source.</span>