Since motorbikes less than 150 cc are worthless to speedsters, the State Transport Officer plans to reduce the number of accidents committed by the 18-21 age group by restricting them to drive motorbikes less than 150 cc.

The State Transport Officer (STO) assumes that ...

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Some experts find motorbikes less than 150 cc are not less prone to causing accidents than motorbikes more than 150 cc.

Speedsters drive all types of motorbikes—less than 150 cc and more than 150 cc.

All motorbikes more than 150 cc have disk-brakes that come standard, inducing speed-sters to drive fast.

Imposing fixed penalty tickets on speedsters will decrease the number of accidents they commit.

Speedsters do not drive motorbikes that are worthless to them.

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What this question tests

Whether you can identify the unstated assumption a critical-reasoning argument depends on.

Picking an option that strengthens the argument or is merely relevant instead of one that is required.

Since motorbikes less than 150 cc are worthless to speedsters, the State Transport Officer plans to reduce the number of accidents committed by the 18-21 age group by restricting them to drive motorbikes less than 150 cc.The State Transport Officer (STO) assumes that ...