In order to help the student expand his/her knowledge I will help answer the question. This in hope that the student will get a piece of knowledge that will help him/her through his/her homework or future tests.
To combine a range of cells into one large cell you should highlight the cells and select Merge Cells. This is a function in Excel. It is quite useful when doing graphical calculations or simple tables. The correct choice is the letter
D. Merge Cells
I hope it helps, Regards.