Answer:
The sentence that BEST rephrases this in modern-day syntax is "When I was 16 I read a book, by a man named Tryon, which recommended a vegetable diet."
Step-by-step explanation:
Grammar syntax changes and is affected by society and their interaction, taking this sentence to mother syntaxis requires the use of different structure and vocabulary, modern syntaxis is much simpler that communication in other previous periods, option B present a simple and easy to understand version of the same information.