B- The Manhattan project was a top secret project carried out by the U.S government to create an atomic bomb.
One of the main ways in which machines changed workers’ lives was that "<span>They divided labor into many small tasks," since this brought about a "specialization in labor," which caused production to be more efficient. </span>
A timeline is the presentation of a chronological sequence of events along a drawn line that enables a viewer to understand temporal relationships quickly. The term is also sometimes extended to mean a chronology that is tabular, year-by-year paragraphs or purely conceptual. Increasingly, timelines are illustrated in infographics combining text and graphic images for a better presentation.
D) The passage of the amendments was to abolish slavery and establish rights to previous slaves.
