Use This Fact Situation to Answer the Related Questions That

Use this fact situation to answer the related questions that follow. A enters into a conditional sales agreement with B,a truck dealership,for the purchase of a truck that B has ordered from the manufacturer but will not receive for another month,during which time A must make his first payment.
In this case,under PPSA legislation,attachment occurs

A) if B delivers the truck to A before the agreement is signed.
B) when A makes his first payment.
C) on the signing of the agreement and delivery of the truck to A.
D) when B takes possession of the truck from the manufacturer.
E) immediately on the signing of the agreement.