To answer this question, the user needs to know what IDE stands for and what it is used for. IDE stands for Integrated Development Environment, which is a software application that provides comprehensive facilities to computer programmers for software development. Once you make this understanding, we can look into each option.

A. Putting a control on the form: This task has multiple ways to accomplish. For example, you can drag and drop a control from the toolbox to the form, or you can right-click on the form and select "Add Control" from the menu.

B. Running the program: This task also has multiple ways to accomplish. You can use the "Start" button on the toolbar, or you can press the F5 key on the keyboard.

C. Activating the property window for a control: This task also has multiple ways to accomplish. You can right-click on the control and select "Properties" from the menu, or you can select the control and press F4 on the keyboard.

D. Both a and b: This option is incorrect because it only includes two of the tasks that have multiple ways to accomplish. Option E includes all of the tasks.

E. All of the above: This option is correct because all three tasks - putting a control on the form, running the program, and activating the property window for a control - have multiple ways to accomplish in an IDE.

Therefore, the answer is: E. All of the above.