Company A signed an exporting contract based on CFR with company B$,$ company A completed the loading of the goods at$2$:$00$am of Oct$\mathrm{.}01$ and did not send out the shipping advice because of the national holiday for Oct$\mathrm{.}01$ and $02.$ In the morning of Oct$\mathrm{.}03,$ Company A received the fax from company B that the vessel for delivering the goods sunk at $4$:$00$pm of Oct$\mathrm{.}02$ and all the goods got lost and required A company pay all the loss.Question:$1.$Do you think A company should pay for the loss? $2.$How to avoid such situation?