HELPPP
 Choose the correctly punctuated sentence below:
 a.
 We are finished learning about punctuation marks, obviously we are moving on to a writing unit.
 b.
 We are finished learning about punctuation marks; obviously, we are moving on to a writing unit.
 c.
 We are finished learning about punctuation marks obviously, we are moving on to a writing unit.
 d.
 We are finished learning about punctuation marks obviously we are moving, on to a writing unit