[ Grammar ]
The dog had managed to _____ the collar that was choking him.
A. lose
B. loose
C. loosen
D. lost

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Which sentence shows a proper use of a plural possessive?
A. All of the student’s backpacks were extremely light on Friday.
B. All of the students’ backpacks were very heavy on Friday.
C. All of the students backpacks’ were very light on Friday.
D. All of the students backpack’s were very heavy on Friday.
