Which sentence has correctly placed commas?

Question

A. My teacher, Ms. Smith, assigned a project about penguins
B. My teacher, Ms. Smith assigned a project about penguins
C. My teacher Mrs. Smith assigned a project about penguins B
D. My teacher Ms. Smith assigned a project about penguins

Answer 1

The sentence with correctly placed commas is:

A. My teacher, Ms. Smith, assigned a project about penguins.

This sentence correctly uses commas to set off the appositive "Ms. Smith" which provides additional information about "My teacher."