Five hundred jigsaw puzzles pieces fell to the floor like a blizzard. the figure of speech according to the sentence above is, a)idiom b)metaphor c)hyperbole d) personification

Identify the sentence in which the underlined word or words are punctuated incorrectly. a) pam was (well prepared) for the debate. b) she had (read three quarters) of the material more than once. c) she has always been (self assured). d) the winner needs a (two-thirds) majority of the votes.