A cloud administrator is analyzing usage trends for a website housed within an IaaS cloud platform. The administrator notices that traffic and visitors to the site quadrupled from the normal baseline during the holiday season. The environment has a load balancer that uses standardized VMs to host the applications.
Given this scenario, which of the following would be the MOST efficient, provide no downtime, and address the temporary spike in traffic?
A . Implement an upward vertical scaling solution.
B . Implement a downward vertical scaling solution.
C . Implement an inward horizontal scaling solution.
D . Implement an outward horizontal scaling solution.