If an Electronically Controlled, Variable Timing Device with a 20

Multiple Choice

If an electronically controlled, variable timing device with a 20 degree timing window has to be static timed at 8 degrees BTDC, where can port closure occur?

A) 8 degrees BTDC only
B) between 8 degrees BTDC and 12 degrees ATDC
C) 28 degrees BTDC only
D) between 28 degrees BTDC and 8 degrees BTDC