Adelaide's Aprons Sells 10 Aprons to a Store in Another

Multiple Choice

Adelaide's Aprons sells 10 aprons to a store in another state which requires shipment. However, the contract states Adelaide's will ship the goods via Fed Ex but does not state when ownership and responsibility transfers. According to the UCC since the contract is silent on that issue, when will title transfer?

A) Once Adelaide's delivers the aprons to Fed Ex.
B) Once the store accepts delivery.
C) Once Fed Ex delivers the aprons to the store.
D) Once the store pays for the aprons.