Identify the essential element missing from the following topic sentence.
Giving holiday gifts can be expensive!
O A. controlling idea
O C. concluding idea
![Identify the essential element missing from the following topic sentence Giving holiday gifts can be expensive O A controlling idea O C concluding idea class=](https://us-static.z-dn.net/files/dcc/2fec8b7728a12c5f00de1145ea8c0f90.png)