Which sentence is a compound sentence?

a.
suddenly, fluffy white kernels began to appear.

b.
the popcorn filled the pot, and the lid started to rise!

c.
as the movie began, we settled on the couch and ate our popcorn.

d.
the popcorn hissed and sputtered in the pot before it started to pop.

Your denunciation of tyrants brass fronted impudence; your shout of liberty and what is the meaning of denunciation as used in this sentence? a) excessive self-assurance b) to deceive, delude, or disappoint c) a ruler who governs without restrictions d) to condemn or censure openly or publicly