Which of these indicated that the tang dynasty had lost the mandate of heaven?

How does a comet change when it comes close to the sun

Explain the significance of martin luther king jr's letter from a birmingham jail and i have a dream speech

Plz ive been stuck on this question forever. in 1753 george washington was sent on a mission to a. build a fort at the point where the allegheny and monongahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio river.