Question

Which of the following sentences with a parenthetical expression is punctuated correctly?

My grandmother, by the way, painted these beautiful watercolors.


My grandmother, by the way painted these beautiful watercolors.


My grandmother by the way, painted these beautiful watercolors.


My grandmother by the way painted these, beautiful watercolors.

Answer 1

It is the first option,

My grandmother, by the way painted these beautiful watercolors.

Step-by-step explanation:

The rest don't make sense in speech, there would have to be pauses at irregular times for the others.

Answer 2

My grandmother, by the way, painted these beautiful watercolors.

Step-by-step explanation:

Normally I would have said "By the way, my grandmother painted these beautiful watercolors." But that wasn't an option so I think it's the first one