Which of the following inventions were initially created during the period from 1900-2000?
a. morse code
b. atomic bomb
c. diesel engine
d. cell phone
e. laptop
f. telephone
select all that apply

B. atomic bomb

D. cell phone

E. laptop

Explanation:

The first atomic weapon, the so-called atomic bomb, was perfected in the United States at the end of World War II. The first two such bombs were dropped on Japan (1945), the cities of Hiroshima and Nagasaki, and showed tremendous destructive power: about 80,000 people were killed and wounded in Hiroshima and two thirds of the city destroyed. They were the main reason for the capitulation of Japan.A laptop or notebook is a relatively small, portable computer that typically weighs up to three pounds. Laptop is an older term that was introduced in 1983.The basic concepts behind mobile telephony were invented at Bell Labs in 1947.

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