The correct answer is D. Girls had laughed a little nervously
Step-by-step explanation:
In literature characterization is about the description or construction of a character during a story, this means characterization is about letting the reader know how the character is including physical features and personality traits. Additionally, characterization can be direct or indirect, in the case of direct characterization the narrator tells the reader the way a character is or looks by using adjectives to describe it; however, in the case of indirect characterization the narrator does not describe the characters directly, but uses their behavior, reactions or the situation of the character to tell the reader something about the character. Considering this the phrase "girls had laughed a little nervously" is part of indirect characterization as the narrator is not directly describing the personality of the girls, but their behavior and reactions indirectly suggest to the reader the way the girls are which is what indirect characterization is about.