Finn Gives His Coin Collection to Gert's Coin Shop to Hold

Finn gives his coin collection to Gert's Coin Shop to hold temporarily.While in the shop's possession,the collection is destroyed.Gert's may be liable for the loss if this was a bailment for

A) both parties' mutual benefit.
B) Finn's sole benefit.
C) Gert's sole benefit.
D) neither party's benefit.