Sheet $1$ and Sheet $2$ are grouped. If you enter a formula in B$3$ of Sheet $1,$ what happens in Sheet $2?$

A$)$ No change happens.

B$)$ Sheet $2$ B$3$ has the same formula.

C$)$ A warning appears, warning you not to make changes in grouped sheets.

D$)$ Formatting will change on Sheet $2,$ but not formulas.