Which word from the paragraph best the reader understand the meaning of the underlined word?

when the terrified child screamed, the brave dog leaped into the water. the black lab pulled the boy by the sleeve until both were safely on shore. the relieved parents were overjoyed that their child was unharmed and that they had such a gallant pet.

a.
terrified

b.
brave

c.
relieved

d.
black