Answer:

The option that demonstrates the correct use of capitalization and punctuation in writing the date is C) Wednesday, February 18, 2015.

Explanation:

First things first, days of the week and months should be spelled with capital letters: Monday, Friday, February etc.

The day of the month does not need its ending letters (-th, -st, -nd or -rd) to show it is an ordinal number. That should only happen when the number comes before the month or when the number stands alone in the sentence:

  • February 18.
  • The 18th of February.
  • Let’s meet on the 18th.

Finally, there should be a comma between the day of the week and the month as well as another comma between the day of the month and the year.

Notice that option B is wrong due to the misspelled abbreviation of Wednesday.