Answer - B.
The AWS Documentation mentions the following to support this.
Weighted Routing.
Weighted routing lets you associate multiple resources with a single domain name (example.com) or subdomain name (acme.example.com) and choose how much traffic is routed to each resource.
This can be useful for various purposes, including load balancing and testing new versions of software.
To configure weighted routing, you create records that have the same name and type for each of your resources.
You assign each record a relative weight that corresponds with how much traffic you want to send to each resource.
Amazon Route 53 sends traffic to a resource based on the weight that you assign to the record as a proportion of the total weight for all records in the group: