Which of the CSS features should be utilized?

You work for a Web solution development company named ABC.com. You are required to identify
the appropriate selector which should be utilized for specification for a style and utilizes # for
identification of unique style elements.
Which of the CSS features should be utilized?

A.
You should consider utilization of an external style sheet.

B.
You should consider utilization of an internal style sheet.

C.
You should consider utilization of the Type and Class CSS selectors.

D.
You should consider utilization of the Id CSS selector.

Explanation:
Developers of ADO.NET application should note that the id selector is used for

specification of a single, unique element and utilizes the Id attribute of the HTML elements defined
with a “#”.