Which ONE of the following AWS service would simplify the migration of a database to AWS platform?

Question $6$Select one:

a$.$

AWS Storage Gateway

b$.$

Amazon Elastic Compute Cloud $($Amazon EC$2)$

c$.$

Amazon AppStream $2\mathrm{.}0$

d$.$

AWS Database Migration Service $($AWS DMS$)$

e$.$

None of the answers is correct