Write the next sentence in this paragraph:

A little boy is holding a tube of toothpaste. His mom helps him put it on his toothbrush. the boy

Available choices:
[a]. laughs and his mom explains that germs cause entire teeth to fall out.
[b]. laughs once the toothpaste is put on his toothbrush.
[c]. then uses the brush to brush his teeth.
[d]. puts toothpaste on one side and then grabs the other side.
[c].