What is the right tag to use for the calculation formula of a Quote Item Custom Field if its value depends on a product attribute value?

What is the right tag to use for the calculation formula of a Quote Item Custom Field if its value depends on a product attribute value?
A . <*CTX (Quote, Currentitem.Attribute…)*>
B . <* CTX ( Product. Attribute…0*>
C . <*VALUE (….)*>
D . <*VALUECODE (…)*>

Answer: A