In the Code for the Add Method in the Implementation

In the code for the add method in the implementation of a heap, what is the missing code? def add(self, item) :
Self.size += 1
Self.heap.append(item)
CurPos = len(self.heap) - 1
While curPos > 0:
Parent = (curPos - 1) // 2
ParentItem = self.heap[parent]
If parentItem <= item:
< missing code >
Else:
Self.heap[curPos] = self.heap[parent]
Self.heap[parent] = item
CurPos = parent

A) curPos += 1
B) break
C) self.heap[ curPos ] = item
D) parent = curpos