To Secure Genuine Maple Syrup, Maple Tree Trunks Are "Tapped

Multiple Choice

To secure genuine maple syrup, maple tree trunks are "tapped" with metal spigots that interrupt the flow of sap in late winter prior to spring budding. Which of the following would be true of this process?

A) Leaves are the ultimate origin of the sucrose component.
B) The sap flows out with some pressure from the phloem tube.
C) The water component originated from soil water absorbed by root hairs.
D) Only a small core is tapped; taking sap continuously from a substantial radius could eventually kill part of the tree.
E) All of the choices are correct.