Answer:
The correct answer is C) a text editor and web browser.
Explanation:
A text editor is important because it is the most basic and necessary tool for coding in any language, such as HTML. A web browser is important because it provides the possibility of testing the code with internet and some other tools and software the person may have uploaded. A WYSIWYG editor is not necessary for manual coding, although it may help in some cases. A monitor is actually a basic tool for all this activity because all machines must have one for visualising everything, however it is not for coding, only for visualising.
