For the two-way single-lane scene where vehicles pass, which of the following camera selection methods is most suitable for?

For the two-way single-lane scene where vehicles pass, which of the following camera selection methods is most suitable for?
A . 4-cylinder machine 2 ball machine
B . 4-cylinder machine
C . 2-cylinder machine 1 ball machine
D . 3-cylinder machine 2 ball machine

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Answer: C