False ,
The punctuated sentence will be :
His doctor at any rate , could not identify the problem.
Answer:
C
Guess:
C?
it made me put 20 characters or i couldn't post
<h2>✅noun. absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies. an occupation, activity, or pursuit in which such interest is shown: Hunting is his latest enthusiasm. </h2>