Why Did the Delegates to the Constitutional Convention Opt for Ratification

Why did the delegates to the Constitutional Convention opt for ratification to occur through ratifying conventions rather than state legislatures?​

A) ​As the states had more power under the Articles of Confederation, they had more to lose if the Constitution was ratified.
B) ​Travel was challenging and relay of information slow. Ratifying conventions were close to each other so problems could be mitigated and concerns addressed efficiently.
C) The delegates wanted to ensure that legislators were included.
D) ​The delegates arranged to have ratification occur in the most open forums possible.