Consider the following XHTML code from a Web form:
How often do you want to be updated? <br/>
<select name=Frequency">
<option> Once a week </option>
<option> Once or twice a month </option>
<option> Once a month </option>
<option value="NotAtAll" > Never </option>
</select>
Which type of Web form field will this code create?

A.
A group of check boxes.

B.
A group of radio buttons.

C.
A single-option select list.

D.
A scrolling multiple-select list.