In a typical medium speed, 4-stroke cycle diesel engine ___________________?

A. fuelinjection starts at 10 before to dead center and ends at 20 after tor dead center

B. may start and end anywhere

C. fuel injection starts at top dead center and ends at 20 after top dead center

D. fuel injection starts at just before top dead center and ends just after top deac center

E. none of the above

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