The reason why hundreds of thousands moved to the cities in Texas during WWII was to a. work in factories supplying war needs.
The second World War required a huge amount of machinery, food, and other items for the allied army to effectively fight the Axis powers.
As a result, many moved from the rural areas to the cities in Texas, to work in the factories that produced these much needed war supplies.
In conclusion, option A is correct.
Find out more on Texas during WWII at https://brainly.com/question/15886070.