Answer:
Sorry for being late but the answer would be C: More water is being siphoned off the Jordan River for agriculture.
Explanation:
The Jordan River flows into the Dead Sea, 200 miles long. Although it is true that minerals are extracted from the Dead Sea, it is not a factor to water shortage. More water has been used from the Jordan River to irrigate and for agriculture, thus less water reaches the Dead Sea. Hope this helps :)