Question

fix any punctuation or capitalization errors below. click \submit answer\ if there are none.
darwin watterson caught up on his email while i downloaded the new track on itunes.

Explanation:

The sentence has correct capitalization (proper nouns "Darwin Watterson" and "iTunes" are capitalized appropriately) and proper punctuation (the final period is correctly placed, and the independent clauses are properly structured without missing or incorrect punctuation).

Answer:

Darwin Watterson caught up on his email while I downloaded the new track on iTunes.