¡Hola!
C) Comemos.
"Amber y yo" signifies that the subject of this sentence is "we".
The conjugation of the verb "comer", (to eat) is shown below:
Como - Yo
Comes - Tú
Come - Él / Ella / Usted
Comemos - Nosotros / Nosotras
Comen - Ustedes/ Ellas / Ellos
The equivalent of "we" in Spanish is "Nosotros", which means that the proper verb conjugation would be C. Comemos.