Which type of leads will receive a non-operational email?

Which type of leads will receive a non-operational email?
A . Marketable leads
B . Marketing suspended leads
C . Blacklisted leads
D . Unsubscribed leads

Answer: D

Explanation:

Reference: https://nation.marketo.com/t5/Product-Documents/How-Does-Marketo-Decide-Whether-a-Person-Receives-Email-or-Not/ta-p/250309