Answer: none, because we need a picture:
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.
Explain to the caller this will take you a little bit to get the answer they need and ask if they want to hold or receive a call back.
When they are used to describe or modify a noun.
For examples:
"You may leave through either door."
"Donald Trump aims to garner the most votes."