Dropdown is a closed-ended field type where people can select only one answer from a menu of choices—ideal for presenting a long list of options without cluttering your form.
The following limits apply when you create a Dropdown field:
When you make a Dropdown field required, you also have to set a default choice that people must change in order to submit the form successfully. In other words, if someone leaves the the default choice selected, Wufoo will consider the field unanswered, and prompt the person to choose an answer for that field in order to submit their entry.
To require an answer to a Dropdown field: