Read the following article and answer the question by choosing from the options.

He must be doing it but I guess never on my watch . Other than that , there is an amazing amount of development that happens in such a short time ! He used to be this peaceful little blob that slept most of the time and seemed only moderately aware of his surroundings . Now he is very ... mobile !

Who may I be describing ?
Select from:
(a). My dog.
(b). My cat.
(c). None of the above choices ..
(d). My baby....A:
(d).