In the below diagram, what replaces the question marks?

Scroll down for a clue and further down for the answer.
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Clue: No letters or numbers need to replace the question marks. Lines are required instead.
Scroll down for the answer.
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Answer: The question marks need to be replaced by lines. These lines extend from the triangles to transform the triangles into the letter ‘A’. The word then spelt downwards is ‘CANADA’. See the below diagram:

Typically in this type of puzzle, there is a letter or number replacing the question mark. This specific puzzle requires lateral thinking to turn the triangles themselves into another letter. The title of this puzzle, “A Mountainous Task” refers to several parts of this puzzle: the answer Canada as being a mountainous country, the difficulty of the question being a mountainous task and also the answer in which the triangles need to be turned into the letter ‘A’ that resemble a mountain peak.