Context: Read the passage. Then answer the question.

European mistletoe is a shrub that grows on trees, including linden trees. The mistletoe has specialized roots that pierce the tree's bark and absorb nutrients and water from inside the tree. These resources from the tree allow the mistletoe to grow up to five feet in diameter!
When the tree loses nutrients and water to the mistletoe, the tree grows more slowly and makes fewer seeds.
Figure: European mistletoe growing on a linden tree.
Which type of relationship is formed when European mistletoe grows on a linden tree?
A. commensal
B. parasitic
C. mutualistic
Determine the correct option from the provided choices and reply with its corresponding letter.

B