To answer this question, you need to understand the different toolbar settings available in the Contact Form applet. Let's go through each option to understand why it is correct or incorrect:
A) History - This option is not relevant to editing the web layout of the Contact Form applet.
B) List - This option is not relevant to editing the web layout of the Contact Form applet.
C) Web Controls - This option is not relevant to editing the web layout of the Contact Form applet.
D) Edit - This option is not relevant to editing the web layout of the Contact Form applet.
E) Target Browser Group - This option is the correct answer. The error you are experiencing when choosing "Edit Web Layout" indicates that you need to specify the target browser group first. By selecting the appropriate target browser group, you can ensure that the web layout editing process is compatible with the intended browser.
F) Debug - This option is not relevant to editing the web layout of the Contact Form applet.
The correct answer is E) Target Browser Group. This option is correct because you need to set the target browser group before being able to successfully edit the web layout of the Contact Form applet.