And are two of the most prominent 20th century inventions that have advanced the development and accuracy of modern maps. a. computers; cell phones c. computers; satellites b. computers; internet d. computers; astrolabe

no its computers and satellites

that is the answer for sure

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.

protected civil liberties and outlawed slavery in the new territories.