What is not a reason for exploration? a religious persecution b empire rivalry c economic opportunity d to receive disease and sickness

C should be the answer you are looking for

I'm sure it's D because nobody travels somewhere to purposely get a disease or sickness.

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.