Identify the best version of the sentences. The psychologist William James believed that facial expressions not only provide a visible sign of an emotion, actually contributing to the feeling itself.
A. emotion, actually contributing to the feeling itself
B. emotion but also actually contributing to the feeling itself
C. emotion but also actually contribute to the feeling itself
D. emotion; they also actually contribute to the feeling of it
Explanation: The original sentence uses the correlative conjunction 'not only... but also' implicitly and needs parallel structure. The phrase 'not only provide' requires 'but also' followed by a parallel verb form. 'Provide' is a simple verb form. Option 3: 'emotion **but also actually contribute** to the feeling itself' correctly pairs 'provide' (verb) with 'contribute' (verb) using 'but also'.
