President roosevelt later used similar reasoning as one justification for-
a. the implementation of the marshall plan
b. dropping atomic bombs on japan
c. u. s involvement in world war ii
d. u. s participation in the league of nations

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.

the answer is b. hope this .

i think i will need more detail to answer if this is a specific question on a test, but technology advancements are good for many industries, such as medicine or food industries, new technology could us in medicine in ways such as new scanners to tell us more about our bodies or new cures or vaccines for diseases.