Questions: Sandra is conducting her research on her library's database. As she works, she emails herself the full text of the articles she's interested in. Why is this a smart idea? Because Sarah is unsure what parts of the essay she wants to use. Because the works cited page requires that the writer have a hard copy of all sources listed. Because her teacher will likely want to read all of her sources. Because if she just cut and pasted the parts of the essay of interest to her, she might lose track of which words are hers, which could lead to plagiarism.

The answer is: Because if she just cut and pasted the parts of the essay of interest to her, she might lose track of which words are hers, which could lead to plagiarism.

Explanation for each option:

1. Because Sarah is unsure what parts of the essay she wants to use.
   This option is not directly related to why emailing herself the full text is a smart idea. While having the full text might help her decide later which parts to use, the primary concern addressed by emailing the full text is more about maintaining the integrity of the source material and avoiding plagiarism.

2. Because the works cited page requires that the writer have a hard copy of all sources listed.
   This is incorrect. A works cited page does not require a hard copy of all sources. It requires accurate citation information, which can be obtained from digital or physical copies.

3. Because her teacher will likely want to read all of her sources.
   While a teacher might be interested in the sources, this is not a common requirement for most assignments. The primary reason for emailing the full text is not to provide access to the teacher but to ensure proper citation and avoid plagiarism.

4. Because if she just cut and pasted the parts of the essay of interest to her, she might lose track of which words are hers, which could lead to plagiarism.
   This is the correct answer. By emailing herself the full text, Sandra ensures she has the complete source material, which helps her keep track of the original content and her own writing. This practice helps prevent unintentional plagiarism by maintaining a clear distinction between her words and those of the authors she is citing.