Consider a supply chain where a retailer orders from a wholesaler who orders from a manufacturer who orders from a supplier. The retailer's monthly standard deviation of demand is $20$ units. The standard deviation of orders was $30,60,70,$ and $40$ units for the retailer, wholesaler, manufacturer, and supplier, respectively. Which of the following is TRUE?

Group of answer choices

The supplier's bullwhip measure is $0\mathrm{.}5714.$

The wholesaler's bullwhip measure is $4.$

The retailer contributes most to the bullwhip effect in the supply chain.

The wholesaler's bullwhip measure is $2.$

The manufacturer is providing a dampening effect.