You need to provision a SharePoint environment for MyTailspin.TailspinToys.com. What should you do?

A My Sites environment needs its own web application bound to the target host name, paired with a root site collection provisioned using the My Site Host template, which installs the personal site hosting infrastructure and navigation. Individual user personal site collections are then created automatically by SharePoint the first time each user visits their My Site, so no manual per-user provisioning is required. This is the minimum infrastructure needed to make My Sites functional under the specified domain.

Manually creating individual site collections for each user is unnecessary because SharePoint automatically provisions personal site collections on first user access.

Configuring the User Profile Synchronization service for a full AD DS import populates user profile properties but does not create or configure the My Sites hosting infrastructure.

The User Profile Synchronization service manages directory data imports into the profile store and has no capability to provision or configure My Sites site collections.