“radical immigrants deported”
“bombs explode on wall street”
“palmer raids criticized by congress”
these post–world war i headlines are most
closely associated with the
(1) volstead act (3) scopes trial
(2) ku klux klan (4) red scare

I believe the answer is 4 because if you think about it, the headlines talk about "radical immigrants", "bombs exploding", and "palmer raids".  The choices given took place a while ago (i don't know of they still do :D), so if you put them together, it sounds quite a bit like the Red Scare.  :D  I hope I helped!  If you need more reasoning, just tell me!  :D

February 1848 is when it was added. if that's what you were asking

The price of oil and inflation are connected in a cause and effect relationship, that is, when the price of oil increases, inflation also increases in an economy. this is because, oil is a major input in the economy, that is, it is used for critical purposes such as fueling of vehicles for transportation, for running of industrial generators and machines, for heating homes, etc.for instance, if the price of oil increases in an economy, it will increase the cost of production for those using the oil in their production processes and they will automatically increase the cost of their products in order to offset the extra costs. this leads to general increase in the prices of products in the market and result in inflation.