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English

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hans uses a wheelchair. although he has a ramp to get in his house, he finds it difficult to get his wheelchair chair up the ramp. which modification would make it easier for hans to get in his house?

a. increase the length of the ramp
b. increase the friction between the wheels and ramp surface
c. decrease the length of the ramp
d.decrease the friction between the wheels and the ramp surface

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    How is this English??

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