Buddha taught that attachment and craving are the roots of all suffering, so for those addicted to drugs or alcohol, Buddha would say that their addiction is a severe attachment, and thus harmful, the teachings of Buddha state that all individuals want to avoid pain and seek pleasure. Hope this helped!
Alexander Graham Bell was the first to patent the telephone. He did most of his research about the telephone in his laboratory in Boston, Massachusetts.
The answer to you question is actually c
The workers can be
protected by "trench box". Trench shields which are known as
Trench Boxes or Trench Sheets as well, are steel or aluminum structures
utilized for securing utility laborers while playing out their obligations
inside a trench. They are generally developed with sidewalls of changing
thicknesses held separated by steel or aluminum spreaders.