<p>Creme fraiche, originally produced in Normandy and particularly (useful in) finishing sauces in French cooking because (it does) not curdle, is (produced by) a process (similar to) sour cream. (No error)</p>
<p>It it C (produced by) or D (similar to)?
My reasoning for C is that I think the idiom is produced IN a process
But my reasoning for D is that "produced by a process similar to THAT OF sour cream.</p>
<p>Which is correct?
Thanks.</p>