You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.

A、You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
B、You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
C、You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
D、You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
E、You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
F、You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
G:You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.
H:You are on a power-driven vessel in fog. Your vessel is proceeding at a safe speed when you hear afog signal ahead of you. The rules require you to navigate with caution and, if danger of collisionexists _________.