What is the meaning of the idiom "writing on the wall"?

a.
messages left for people one knows

b.
a sign that something bad is about to happen

c.
children's drawings and scribbling

d.
a warning of danger to keep people away

I am pretty sure it is 'B', A sign that something bad is about to happen

I am pretty sure it is 'B', A sign that something bad is about to happen

“the first decision that led to brutus’ downfall is when he decided that he would join the conspirators in their plot to kill caesar. the plot did not work. the conspirators had to flee for their very lives. the second decision that led to brutus’ downfall is when he refused to listen to cassius. “ i hope this information you.