Respuesta :
On Monday, August 31, Harriet will turn six-teen and will receive her driver's license.
Answer:
On Monday, August 31, Harriet will turn 16 and get her driver’s license.
Explanation:
A comma is needed to separate the day of the week from the month. This is why a comma is needed between Monday and August. The introductory phrase in this sentence is "On Monday, August 31." All introductory phrases should be followed with a comma, which explains why a comma is used after 31.