Unused capacity Virtual Machines

Question:
Which type of Virtual Machine (VM) takes advantage of unused capacity in data centers at a much lower cost than regular VMs of similar sizes?

1. Dedicated hosts
2. Transient or Spot VMs
3. Shared or Public Cloud VMs
4. Reserved virtual servers

Answer:
B - is the correct answer. Transient or Spot VMs offer the unused capacity to users at lower costs - they deprovision and reclaim capacity as needed