Answer: (d) I like trying new activities; therefore, I'm looking forward to learning to snowboard.
Explanation: a conjunctions is a word that joins or connects sentences or phrases, the word "therefore" is an adverb that acts like a conjunction (a conjunctive adverb). When we use words like "therefore", "however", "moreover" etc, to connect to independent clauses, we need to put a semicolon before those words, and a comma after: "I like trying new activities; therefore, I'm looking forward to learning to snowboard.
There is a novel named Of Beetles and Angels by Mawi Asgedom, and his book was an extraordinary adventure from a refugee camp TO HARVARD.
His book teaches us that even if you're at the lowest point in life, try and you can get what you want.
Well saying dunno is an error in formal/academic writing. In academic writing you would have to write, i do not know, though.
What is the largest mountain