Which of the following is not one of the ilo’s four core labor standards?

a.
the abolition of child labor
b.
the elimination of forced and compulsory labor
c.
the freedom to unionize and bargain collectively
d.
the elimination of sweatshops

b. native americans them

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.