Answer:
I would say c
Explanation:
A chocalate chip cookie is a combination of both the dough and the chocalate chips seperately physically combined so it cannot be a pure substances (as pure substances are one type of substance only, such as just Methane). It is also homogeneous because to be homogeneous, you have to be uniform throughout and a chocalate chip cookie has an uneven placing of chocalate chip cookies.
