Why 'Easter'? (the Mardi Gras is the last merry celebration until after...)

[Ilovepsycho]

Q. Lent is a period of fasting observed in many Christian churches. Lent begins on Ash Wednesday and lasts until Easter. The day before Ash Wednesday is Shrove Tuesday, and in some cities a merry and lively festival called the Mardi Gras is held on that day. For many, the Mardi Gras is the last merry celebration until after ________.

a. Easter

b. Ash Wednesday

c. Sunday

D. good Friday

Someone insists on 'a. Easter' but I don't know why 'a' is correct?

Who tell me the reason?

[Mister Micawber]

Because there are no merry Christian holidays between Mardi Gras and Easter.
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Native English teacher at Mister Micawber's

[Milanya]

The question has nothing to do with your knowledge of English language and has a lot to do with your knowledge of Christian holidays.
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con·text - The part of a text or statement that surrounds a particular word or passage and determines its meaning.