How did braceros the war effort? a) they produce new varieties of vegetables. b) they produce more automobiles. c)they introduce irrigation for agriculture. d)they meet labor shortages for industry.

The correct answer is D.

The Bracero Program was an agreement reached between the US and Mexico during WWII. There was an important labor shortage in the agricultural products industry, and this program provided almost half a million workers from Mexico to sustain the production in agricultural activities in Oregon during the war. They also helped to run the railroads for the transportation of the finished products, war materials or people.

D is correct

Explanation:

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.