RiverRocks $($whose WACC is $12\mathrm{.}4\%)$ is considering an acquistion of Raft Adventures $($whose WACC is $15\mathrm{.}2\%).$ What is the appropriate discount rate for RiverPlocks to use to evaluate the acquisition? Why?

The appropriate discount rate for RiverRocks to use to evaluate the acquisition is $\%.($Round to one decimal place.$)$

Why? $($Select the best choice below$)$

A$.$ Rath Adventures' WACC is the most appropriate discount rate to account for the risk of Ratt Adventures' cash flows.

B$.$ RiverRock' WACC is the most appropriate discount rate to account for the risk of Rate Adventures' cash flows.

C$.$ An average WACC from RiverRocks and Ratt Adventures will best account for the fisk of Raft Adventures' cash flows

D$.$ The risk$-$free rate will best account for the risk of Rath Adventures' cash flows since RiverRocks' will pay cash for the transaction.