According to the text, in what way has the modern building design worried architects...

✂️ a) Glass façades make buildings quite expensive.

✂️ b) Glass façades make buildings too hot.

✂️ c) Glass façades require control systems, which are not safe enough.

✂️ d) Glass façades make people afraid of living in modern buildings.

✂️ e) Glass façades make buildings dangerous for people on the streets.

Responda: According to the text, in what way has the modern building design worried architects, builders and engineers?