Answer: B. Valves
The intake valve allows oxygen laden air to be drawn into the cylinder. The air mixes with the fuel and combusts in the cylinder to deliver power.
The exhaust valve opens to expel combustion products before the next cycle begins.
D. single-issue parties hope this helps :D
D is the answer your looking for
A situation in which you could use Direct perception checking is asking someone they thing about something happening in the world. ex. (florida shooting)
It established a government separate from England !