What level of assurance for a digital certificate only requires an e-mail address?

What level of assurance for a digital certificate only requires an e-mail address?

A.
Level 0

B.
Level 1

C.
Level 2

D.
Level 3

Explanation:
Reference: http://csrc.nist.gov/publications/nistpubs/800-63/SP800-63V1_0_2.pdf