What are the key differences between the Registered and Controlled Tiers? $($Select all that apply$)$

The Controlled Tier carries a higher risk of re$-$identification than the Registered Tier.

Data are only removed and transformed in the Registered Tier.

Data are removed and generalized in both tiers, but to a lesser degree in the Controlled Tier.

Genomic data is only available in the Controlled Tier.