A company has an on-premises MySQL database used by the global sales team with infrequent access patterns. The sales team requires the database to have minimal downtime. A database administrator wants to migrate this database to AWS without selecting a particular instance type in anticipation of more users in the future. Which service should a solutions architect recommend?

1. Amazon Aurora MySQL
2. Amazon Aurora Serverless for MySQL
3. Amazon Redshift Spectrum
4. Amazon RDS for MySQL