Which historical event contributed to the development of the rock and roll music genre?

Successis toeffort as failure is to: a,devotion b, disaster c, chance, laziness

How has immigration influence the food choices in many countries?

Known officially as a parliamentary democracy, but sovereign to the united kingdom, which canadian official is the head of canadian government? a) the president of canada b) the prime minister of canada c) the governor general of canada eliminate d) the royal canadian mounted police