The neutrality act of 1939

a. relaxed restrictions on the U. S. ships sailing into combat zones
b. allowed the allies to buy weapons on the same cash-and-carry basis as nonmilitary items
c. banned american merchants from selling nonmilitary goods to the axis powers
d. prohibited american merchant ships from carrying cargo to nations at war

mass production/ assembly line production

answer: are there any

explanation:

native american contribution: the patriots from britain learn how to hunt, fish, and introduce diversity within cultures.

african americans: indirectly introduced the idea of diversity to americans. africans coming to america because of slavery taught white americans that people come from different backgrounds and colors. it also built america's economic stability for a great period of time. 

women: make america what it is today. there are some societies that are in the world currently that do not give women the same right we give women here in the united states. because women have rights here in the united states, other countries' citizens strive to come to america, especially women, since they have equal rights in the united states. this is important because america is seen and desired by many in the world. 

children: children are our future. we learn from our elders and carry out things the same or differently learning from america's history. we continue tradition and change tradition if it is needed.