Which of the following is a reason why the demand for salt was as high as gold at one time? Salt could be used as medicine. Salt was necessary to preserve meat. Mansa Musa gave away so much gold that salt was more rare than gold. People did not know that items could be made out of gold ...

The demand for salt was as high as gold at one time is because salt was necessary to preserve meat. The salt is a water permeable and subsequently expels water from any nourishment. Without water microscopic organisms don't duplicate and subsequently go about as additive. Fundamentally, salt works by drying nourishment. Salt ingests water from nourishment, making the earth excessively dry, making it impossible to bolster unsafe form or microbes.