How was pseudo-dionysius’ idea that radiant light means divinity reflected in gothic art? a. the architecture was all religious b. the architecture had a sense of transparency c. both a and b d. neither a nor b

I believe that the correct answer is B. the architecture had a sense of transparency.
It didn't have to be religious, not necessarily, but it gave off the image of being almost transparent. Transparency is somehow related to God, divinity, religion, and generally such Christian feelings, which is why Pseudo-Dionysius wanted to implement such characteristics. 

This answer would be true