In most vietnamese american households, english is the primary language both vietnamese and spanish is spoken the tet holiday is rarely celebrated vietnamese is the primary language

Vietnamese is the primary language is the correct answer.

Explanation:

Vietnam is the southern east country of the Indochina peninsula.It is home to 90.5 million people and ranks eighth with the population. It is bordered by Hanoi, Malaysia, Laos, China and Cambodia. It was ruled by China till 939 AD,  Later the french took over it in nineteenth century. After the french left, it got divided in North and South Vietnam. The languages spoken in Vietnam has been greatly shaped by the years of immigrates, kingdoms and colonial powers. Today Vietnamese is the official language of Vietnam, it is an austro-asiatic language and originated in the north Vietnam. It was written using modified Chinese characters but later they developed their own script.

a.   it resulted in widespread unemployment.

it would be that mali has the worst literacy rate than the others