下面这题的答案，到底是啥呀？求高手帮忙

Question

Dynamics CRM当中
You plan to create a field that will store email addresses.
You need to ensure that a user can send an email message by clicking the email address
in the new field.
Which type of data should you use for the field?
A. Lookup
B. Two Options
C. Single Line of Text
D. Option Set

Answer 1

选 C. Single Line of Text