Tree ring dating a. can only be used in the Southwest. b. reflects dry and wet years in the tree rings. c. can only be used if you already know the date. d. can only be used on trees less than 500 years old. Please select the best answer from the choices provided A B C D

the answer is b your welcome : )

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.

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.

your answer would be a) no nation can be economically self-sufficient.

stay in school!