Which cookie can you use to determine if a session is a part of an experiment, and what information does the cookie provide?
A) The _gat cookie value includes the experiment ID and variant index of live experiments.
B) The _utma cookie value includes the experiment ID and variant index of live experiments.
C) The _gaexp cookie value includes the experiment ID and variant index of live experiments.
D) The _ga cookie value includes the experiment ID and variant index of live experiments.
https://www.youtube.com/watch?v=bAihDUVuHxs
