Which of these transitions would be used to show a relationship?

AFirst of all
BMeanwhile
CWith regard to
DOut of the blue

Verified Answer :

107805
CWith regard to because you could have regard towards someone else.

When you need to show a relationship or to make clear what the relationship is towards something you mentioned you can make use of with regard to.

Question: Which of these transitions would be used to show a relationship?

Answer: c. With regard to