Read this passage from "the oasis: africa": suddenly the sheikh stopped and pointed to the south. the caravan halted, and everyone prepared his arm. matchlocks were primed, cartridges rammed home, and swords loosened in their sheaths. was it the tuaregs again across our path? but mohammed, the keen-eyed, shouted joyfully— “the oasis, the oasis! i see the palm-trees.” in the passage, how does the tone shift? s: (a) the tone shifts from happy to sad. (b)the tone shifts from anxious to excited. (c)the tone shifts from angry to excited. (d)the tone shifts from sad angry.

(B)The tone shifts from anxious to excited.  

Explanation:

The excerpt begins by showing an anxious tone where the characters are anxious and curious about what is waiting for them on the journey they are making. However, the tone changes to excited, when Mohammed yells "The Oasis, the Oasis! I see the palm trees "This shows a happy tone for having found a place of calm and rest.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.