What does this phrasal verb mean: "Make it up"?

[dzungqn]

Test No. incompl/inter-5 "do/make/get/take", question 4

After they had shouted at each other, they decided to ......... it up.

(a) do
(b) get
(c) make
(d) take

Test No. incompl/inter-5 "do/make/get/take", answer 4

After they had shouted at each other, they decided to make it up.

Correct answer: (c) make

Your answer was: correct
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I made it right but in fact I dont understand so much with "make it up" in this case, pls expain. Tks

[Torsten]

To make up is a phrasal verb which can have many different meanings depending on the context you are using it in.
In the given sentence it means to become friends again after having quarreled.
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