THIS 1 QUESTION IS WORTH 30 POINTS please help me This term referred to a ruler who followed in Muhammad's footsteps.

1. Imam

2. Caliph

3. Messiah

4. Sultan

Between 1518 and 1548, spanish conquistadores conquered most of the new world, motivated by the a) desire for scientific knowledge. b)  to urge to claim more territory for spain. c) belief that an all-water western route to the orient existed. d) desire to advance national glory, serve god, and seek personal wealth.

Which choice best describes the general trend for the countries shown, for the period 2008 - 2010?

The american public was excited by the invention of the railroad system. true false