which of the following is an informal expression for "goodbye" in French?

a. Salut!
b. au revoir
c. pas mal
d. abientot

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Sra (aka Mme)

The informal expression for "goodbye" in French is option a. "Salut!" To determine the correct answer, you can break down the options and analyze their meanings.

a. Salut! - This is an informal way of saying "hello" and "goodbye" in French. It is commonly used among friends and acquaintances.

b. au revoir - This is the formal expression for "goodbye" in French. It is used in formal settings or when saying goodbye to someone you don't know well.

c. pas mal - This phrase means "not bad" in French and is not an appropriate way to say goodbye.

d. abientot - This phrase means "see you soon" in French and is not a direct alternative for "goodbye."

Therefore, the correct answer is option a. Salut!