The change that was made in the second sentence is that it created a compound sentence. The correct answer is option B. The compound subject now has two independent clauses: "The holidays are just around the corner" and "I need to go shopping". The independent clauses are connected with the coordinating conjunction "so".
The correct answer is the last option.
To credit a source means to ACKNOWLEDGE WHERE YOU FOUND A SOURCE. In order to avoid plagiarism, the writer has to cite the sources where he found information, being the most common citation formats APA or MLA. The citation style to use will depend on the topic to discuss in the paper.
