I think old fashioned would describe them
I believe the answer is "sectional tensions"
It did help lower shipping costs, and it did bring prosperity to towns, so it's either A or C, and I'm pretty sure it helped unite the growing country.
You can use google for Better answer
A or B and C
Answer:
When the war ended, and the Japanese themselves had been forced out, many Southeast Asians refused to live again under European rule. They called for and won their independence, and series of new nations emerged. The Philippines became the first of the world's colonies to achieve independence following world war 2.