Which sentence is punctuated incorrectly?

a. Daniel received two, expensive parking tickets.
b. He drives his father's big new car.
c. Daniel has dark brown hair.
d. He also has a bright, cheerful smile.

a. Daniel received two, expensive parking tickets.

The sentence punctuated incorrectly is:

a. Daniel received two, expensive parking tickets.

To identify which sentence is punctuated incorrectly, we need to analyze each option and look for any punctuation errors:

a. Daniel received two, expensive parking tickets.
In this sentence, there is a punctuation error. The comma before the word "expensive" should not be there. The correct punctuation would be: "Daniel received two expensive parking tickets."

b. He drives his father's big new car.
This sentence does not contain any punctuation errors.

c. Daniel has dark brown hair.
This sentence does not contain any punctuation errors.

d. He also has a bright, cheerful smile.
This sentence does not contain any punctuation errors.

Therefore, the sentence that is punctuated incorrectly is option a: "Daniel received two, expensive parking tickets."