What begins the combustion phase of a four-stroke engine cycle? A. The air-fuel mixture is compressed.
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B. An air-fuel mixture flows into the cylinder.
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C. The air-fuel mixture is ignited.
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D. The air-fuel mixture expands.

we need the questions , i may then you.

catya your not at all which answer i've seen you do this on another question!

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest