下面这道题选啥？求高手！！

[draling]

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

[draling]

不知道还有其他答案吗？

[ylovep]

B。。。。。。。。。。。。。。

[draling]

引用 1 楼 ylovep的回复:

B。。。。。。。。。。。。。。

为什么选B呀？求解释！