[ Vocabulary ]
Magnetism
A. a force that pulls a magnetic material across a distance
B. a condition in an experiment that is changed in order to determine the effect of that change
C. an idea that can be tested by experiment or observation

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Grammar › ViewAgatha Christie, ____________ books are world famous, was born in 1890.
A. for which
B. whose
C. where
D. whom
Grammar › View
Is the sentence grammatically correct or incorrect?
Andrew uses a headset to listen to movies in the car.
_______
A. Correct
B. Incorrect
