In "Cambridge preparation to TOEFL"'93 book I've found the phrase:
The old woman made a special tea with __ herb that smelled of oranges.
The correct answer is "an". But the woman added the specific herb, not just a herb. The herb is determined by the phrase "that smelled of oranges".
Would this phrase be grammatically/semantically correct, if we use "the" instead?
If there is any difference, tell me the British version of this.