C. It is effective, because the fast pace helps the reader relate to Lani's anxious feelings.
Explanation:
You can see and feel that anxious feeling that Lani feels in the following line "Lani gripped the steering wheel, her gloved hands steady, and listened anxiously for the starting gun's pop. Engines roared and bubbled around her, while her heart thudded unmercifully in her chest". I think this line here makes the statement all more suspenseful and effective in enhancing the narrative.
