Keep silent.Where do we see this si

Keep silent.
Where do we see this sign

A. At the library
B. At the restaurant
C. At the stadium
D. At the gallery
E. At the laboratory

20. We can't go there. We should turn around. The road is closed.
What is the sign?

Hasil (Bahasa Indonesia) 1:

Tetap diam.Di mana kita melihat tanda iniA. di PerpustakaanB. di RestoranC. di StadionD. di GaleriE. di laboratorium20. kita tidak bisa pergi ke sana. Kita harus berbalik. Jalan ini ditutup.Apa yang dimaksud dengan tanda?