What Does the Virus That Causes the Breaking of Tulips

What does the virus that causes the breaking of tulips do to cause this effect?

A) infects the phloem and reduce the flow of sucrose to the bulbs
B) suppresses the expression of reds and blues in some perianth cells but not others
C) causes the cloning of cells similar to cancer
D) creates holes in the phloem allowing for the leakage of sap that attracts aphids who then create tunnels to the bulbs
E) None of the above are correct.