The masthead I believe. He's comparing himself to a part of a ship. He compares his skin to the wood.
Well, it kind of depends what you're advertising for. Here are some of the ones that came up to the top of my head when I thought "commercial".
"Buy now!"
"Parts sold separately."
"Vote ______!"
"_______ is not responsible for any tragedies."
"Consult with your doctor before taking ________."
"*name of the product, and then catchy slogan*"
Some of the elements which can be considered to be gothic in "the pit and the pendulum" are darkness, internal struggle, horror and terror experienced by the main character, lack of freedom, torture, etc.
Beneath it rung the battle shout/And burst the cannon's roar;
Answer: Option C.
<u>Explanation:</u>
This excerpt has been taken from the poem "Old Ironsides" which has been written by Oliver Wendell. The poem talks about a ship which is a war ship. It is a proud ship because it is a war ship.
This ship has grown through various battles and wars making it a strong ship and thus a powerful ship. Because of all this hardships, this ship deserves a good end.