Correct option is C
Option
(c) contains the error.
· The phrase
“because for” is grammatically incorrect. You can either say
“because of” or
“for”, but not both together.
· Correct sentence:
remained closed because of their fragility.
Grammatical rule used:
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‘Because of’ is a preposition followed by a noun, and
‘because’ is a conjunction followed by a clause.
Example:
· Incorrect: He left because of he was tired.
· Correct: He left because he was tired.
· Correct: He left because of tiredness.
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Information Booster: Never use “because for” together – it’s a redundancy error.