下面的代码片段用于反转单链表，请进行（ ）修改，使其能正确实现相应功能。 ListNode* reverseLinkedList(ListNode* head) { ListNode* prev = nullptr; ListNode* current = head; while (current != nullptr) { ListNode* next = current->next; current->next = next; prev = current; current = next; } return prev; }
A：current->next = next; 应该改为 current->next = prev;
B：ListNode* next = current->next; 应该改为 ListNode* next = prev->next;
C：current != nullptr 应该改为 current->next != nullptr
D：ListNode* prev = nullptr; 应该改为 ListNode* prev = head;
正确答案：A
试卷来源：202403 CCF-GESP编程能力等级认证C++六级真题