Answer:
C. pGLO plasmid
Explanation:
A vector is a piece of DNA that serves as a vehicle for the transfer of a desirable foreign gene into a cell of interest, also known as recipient cell. After successful transfer of the gene of interest into the cell, it becomes replicated and expressed along with the genome of the cell.
In this case, the pGLO plasmid carry GFP gene which happen to be the gene of interest. pGLO plasmid is serving as a vehicle and hence, referred to as the vector.
The correct option is C.