Final answer:
Option B: 'I know of no way of judging the future but by the past' from Patrick Henry's Speech to the Virginia Delegates best represents an attempt to appeal to logos.
Step-by-step explanation:
The sentence from Patrick Henry's Speech to the Virginia Delegates that best represents an attempt to appeal to logos is Option B: I know of no way of judging the future but by the past. This sentence appeals to logos, which is the use of logic and reason to persuade the reader, by emphasizing the importance of using past experiences to make informed judgments about the future.