Explanation

The sentence with correct punctuation usage is:

C) The concert was amazing - I've never heard such talented musicians.

Here's a breakdown of why the other options are incorrect:

• A: Commas should be used to separate items in a list. The correct punctuation would be: "My favorite hobbies include reading, knitting, and cooking."
• B: The comma after "outside" is unnecessary. The correct punctuation would be: "It's raining outside; however, I brought my umbrella."
• D: The semicolon is used incorrectly. A comma would be more appropriate: "The professor's lecture was long, but it was informative."