Final answer:
To emphasize a phrase in a sentence, such as 'with her head held high,' the use of dashes is most fitting. Dashes provide a visual break and place extra emphasis on the included phrase, making it stand out in the sentence. The correct option is B.
Step-by-step explanation:
To emphasize the part of the sentence in bold, you should utilize dashes. According to the rules of punctuation, dashes are used to set off or emphasize the content enclosed within them, placing more emphasis on the appended content than parentheses or commas. For instance, Gertude-with her head held high-fought for her basic rights strongly emphasizes the phrase.
Dashes are particularly effective in drawing attention to a specific part of the sentence, providing a visual separation that can make the text more impactful or provide additional context. They serve to create a slight pause in the reading, which further highlights the importance of the phrase they encircle. The use of dashes is appropriate when the inserted phrase is crucial to the meaning of the sentence or provides a sudden addition of information or emphasis.