SAT Form, Structure, and Sense Question

Interest in mechanotransduction, the mechanism by which cells sense and convert mechanical stimuli into biochemical signals, is expanding because of innovative work by biomedical scientists—many of whom, like neuroscience and biophysics expert Elba Serrano, this mechanism to better understand how the body’s neurological and biomechanical systems interact. Which choice completes the text so that it conforms to the conventions of Standard English?