Answer:
A
Step-by-step explanation:
The correct answer is:
A. als
Claudia is saying that traditional dresses are more comfortable compared to modern ones, and in German, the idiomatic expression for comparison is "so ... wie" (as ... as), and for expressing contrast, "so ... wie" is replaced by "so ... als" (as ... as). So, the correct option is A. "bequem als moderne Kleider" would mean "comfortable compared to modern clothes".