Which solution should this company use?

A company has augmented its Data Center infrastructure by using vCloud Hybrid Service during
peak hours. The company wants to extend their existing subnets into the cloud while workloads
retain their existing IP addresses. The virtual machines in these subnets use an NSX Edge
Gateway as their default gateway.
Which solution should this company use?

A.
Layer 2 VPN

B.
MPLS VPN