Certified OmniStudio Consultant

A company has an existing OmniScript that collects customer information. User feedback indicates that the current process requires excessive typing because all data is entered in input text fields. Users are also concerned because there is no validation in the data entered, and they can sometimes submit data containing errors. The required inputs are first name, last name, age, and email. Users are also shown a brief questionnaire about customer satisfaction.

Which three input elements can the consultant recommend to improve usability and provide validation?