Answer:
i think C
Explanation: thats what i choose on my middle school test and got it right
The American pre-civil war got very wide spread because people started protesting toward the government. Slavery was a big issue because the south slaves were not free but the other part of the state which is north america made slaves free. There was speeches that started to encourage slavery to stop because of the treatment of the slaves and that everyone should be equal throughout the country.
B is correct. The torque is modified by the pitch and friction resistance of the threads. The clamping force is the resultant force pulling the head to the gasket.