Answer
(e)
Work Step by Step
The salinity of the Dead Sea is primarily explained by the combination of factors II and III. The lack of outlets for water to escape causes high evaporation rates, which concentrates the salt in the water. Additionally, the relatively impermeable soil at the bottom of the lake prevents water from seeping out and further contributes to the high salt concentration. There is no evidence or correlation between the salinity of the Dead Sea and the presence of high concentrations of uranium (factor I).
The answer is (e).