Question

Which states' delegates most strongly opposed the Virginia Plan?
large states
northern states
small states
southern states
slave states

Answer 1

Small states" meaning states with small populations.

Answer 2

Smaller states feared larger states would out vote them if representation was based on population. The Virginia Plan proposed that each of the states would be represented in proportion to their "Quotas of contribution, or to the number of free inhabitants." States with a large population would have more representatives than smaller states. This upset the smaller states.