BOTH INTERNATIONAL & INLAND Which statement is TRUE of a 30-meter sailing vessel underway?

A
She must show sidelights and a sternlight in restricted visibility.
B
She may show an all-round white light at the top of the mast.
C
She need not show a sternlight if she is showing all-round lights on the mast.
D
If she is using propelling machinery, she shall show forward a shape consisting of two cones, apexes together.
E