Answer:
B
Explanation:
This sentence can be written as in B, or it can be written without a comma by changing the structure and word choice. Commas are used to mark pauses so that the emphasis of the sentence is clear and so that the interrupters have the desired effect.
Another way to write this sentence would be:
There really is no way to know in advance.
The author is J. B. Priestley
<span>She has made physical advances toward Lancelot.</span>
