The government can ensure greater resources for medical care in a crisis by * a. Stockpiling equipment to keep workers safeOption 1
b. Lowering cost of tests and treatmentOption 2
c. Giving researchers incentives to develop vaccines faster
d. all of the above

D

Explanation:

all of the above because they all would help

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.