Read the following sentence:
My blue bicycle is in the shop where Lucy who works at the racetrack now used to work before she took up blacksmithing.
Which version highlights the relative clause and punctuates it correctly?
[] My blue bicycle is in the shop where Lucy, who works at the racetrack now used to work, before she took up blacksmithing.
[] My blue bicycle is in the shop where Lucy who works at the racetrack now used to work, before she took up blacksmithing.
[] My blue bicycle is in the shop where Lucy, who works at the racetrack, now used to work before she took up blacksmithing.
[] My blue bicycle is in the shop where Lucy, who works at the racetrack now, used to work before she took up blacksmithing.