This is how to conjugate the verb ESTAR (which means to be) in the present tense:
yo estoy, tu estás, el/ella/Usted está, nosotros estamos, vosotros estáis, ellos/ellas/Ustedes están.
Your sentence is I am home. In Spanish, the word YO stands for I in English. This means that you would use the form estoy in your example.
The correct answer is B. estoy.
1) Red
2) One
3) Nod
4) Nerd
5)No
6) Do
7) Or
8) Ho (What Santa says)
9) Hoe (A garden tool)
10) On
Ella sabe Covina las verduras
I don't speak much Spanish but Mucho todos preferimos la pared con imigos