I think "D" would be the write answer
https://kb.netgear.com/000051185/What-are-link-aggregation-and-LACP-and-how-can-I-use-them-in-my-network

What are the benefits of link aggregation?

Link aggregation offers the following benefits:

Increased reliability and availability. If one of the physical links in the LAG goes down, traffic is dynamically and transparently reassigned to one of the other physical links.
Better use of physical resources. Traffic can be load-balanced across the physical links.
Increased bandwidth. The aggregated physical links deliver higher bandwidth than each individual link.
Cost effectiveness. A physical network upgrade can be expensive, especially if it requires new cable runs. Link aggregation increases bandwidth without requiring new equipment.

Correct "A"
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