The oil must be used up,    the light went out.

A. for   B. because  C. since   D. as

The oil must be used up,    the light went out.

A. for   B. because  C. since   D. as

The oil must be used up,    the light went out.

A. for   B. because  C. since   D. as

The oil must be used up,    the light went out.

A. for   B. because  C. since   D. as

The oil must be used up, ____ the light went out.

A. for   B. because  C. since   D. as