please help me with this writing question

Test Preparation SAT Preparation
1

<p>guys i need your help !</p>

<p>A(That) our professor spoke B(so movingly) about our history,
C(but knew) D(so very little) about it, is perplexing. E(No error)</p>

<p>the answer is E, no error, but can you use 'very' right after 'so'?
D sounds way weird to me. what dyou think?</p>

2

<p>Yes, the answer is E, but this question does not sound like a reasonable type. D is grammatically correct - it is an idiom and used correctly as an adverb - , but it suffers severely from colloquiallism. Additionally, the comma before "is" is illogically placed, at best.</p>