When unemployment became very severe in puerto rico, during the early to mid-1970s the u. s. government responded by?

The US made investments in Puerto Rico.  It also lifted to free taxes in trade so Puerto Rico can gain ground with their economy. These economic decisions helped Puerto Rico increase their employment and improve their economic status.

I hoped this answered your question.  

Upheld the 1st amendment according to the u.s constitution. freedom of speech being limited in this case yes national emergencies