Why did portugal build trade forts on the west african coast, rather than go into the interior to trade?

(02.04 mc) the table below shows the number of immigrants to the united states from different regions of europe between 1871 and 1910: european immigration northern/western europe southern/eastern europe 1871-1890 5,850,689 1,160,906 1891-1910 3,554,313 8,244,864 which statement explains the trend shown in this table? (6 points) during the late 1800s, there was a decrease in industrial growth and fewer job opportunities in the united states. in the late 1800s, immigration laws were more lenient than immigration laws passed during the early 1900s. in the late 1800s and early 1900s, the u. s. government passed restrictions on immigration from northern and western europe. during the late 1800s and early 1900s, there was extreme poverty or religious and political persecution in southern and eastern europe.