In a web address, the domain indicator (suffix) '.com' stands for:

Correct option is D

 In a web address, the domain indicator (suffix) '.com  is for Commercial 

It was originally intended for commercial organizations, businesses, and for-profit entities when it was first introduced in 1985. 

Other - 

1. .com — most popular domain extension for any business and widely recognized

2. .net — good for tech or web-based companies since it derives from the term “network”

3. .org — popular choice for non-governmental organizations or informational websites, but not suggested for commercial use

4. .co — newer and shorter alternative to .com and more in line with younger generations

5. .us — reserved for citizens and entities in the United States