Answer:
"an american politician, diplomat, and geopolitical consultant who serves as US secretary of state and national security advisor"
Legislatures, and courts are the most effective anvenues for defending and expanding our rights and liberties
Black holes themselves can not be seen, nor do they leave trails (since emptiness does not have to be caused by a black hole), but there is evidence for black holes: scientists can see the effects of their gravity on nearby stars. The answer is B.
magsikap,bigyan ang mga Bata ng pag aaral,