Elijah McCoy’s invention of the automatic oil cup made his job . A) safer

B) more efficient

C) all of the above

C.

Explanation: Elijah s' invention was a great help for the steam-moved locomotives and ships, because they wouldn't have anymore to stop their routes with greased engines.

the first two-party system consisted of the federalist party, who supported the ratification of the constitution, and the democratic-republican party or the anti-administration party (anti-federalists), who opposed the powerful central government, among others, that the constitution established when it took effect in

i disagree that there is little difference between adult female development and adult male development. sociological studies comparing female and male pathways to adulthood, revelead that there are sustancial differences between them. particularly, female and male differ from timing of marriage, when they began to live with children and the likelihood of combining wife/husband and parent roles.