Given the BinaryTree class (partially shown below) , select an expression to complete the static recursive helper method rightMostValue, which is designed to return the data value in the rightmost node of the tree rooted at node n. 
Definitions:
Mutagens
Agents that cause mutations or changes in the DNA of organisms, which can lead to genetic diversity or, in some cases, diseases like cancer.
RNA
Ribonucleic Acid, a molecule essential for coding, decoding, regulation, and expression of genes.
DNA
Deoxyribonucleic acid, the molecule that contains the genetic instructions for the development, functioning, growth, and reproduction of all known living organisms and many viruses.
Chemical Hazard
A type of hazard posed by chemicals which can cause harm or damage to humans, animals, or the environment.
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