Confused About C++ Linked List Quiz Question: Why Is My Answer Wrong?

I need some help with a quiz question my professor marked wrong. The question involves completing a function called `removeAfter()` in a singly-linked list class in C++. The function checks a few conditions before attempting to remove a node. Here's the relevant part of the code snippet:

```c++
void removeAfter(Node* currentNode) {
if (currentNode == nullptr && head) {
Node* nodeBeingRemoved = head;
head = head->next;
delete nodeBeingRemoved;
if (head == nullptr) {
tail = nullptr;
}
}
else if (currentNode->next) {
Node* nodeBeingRemoved = currentNode->next;
Node* succeedingNode = xxx;
currentNode->next = succeedingNode;
delete nodeBeingRemoved;
if (succeedingNode == nullptr) {
tail = currentNode;
}
}
}
```

I answered with `nodeBeingRemoved->next` for the placeholder `xxx`, but the professor marked it wrong, stating that the correct answer is `currentNode->next->next`. A few of us got it wrong and when we asked the professor for clarification, he couldn't really explain why. Can someone help me understand this? Thanks!