1."Here's a photo of four generations of my family, taken last week at my great-grandmother's ninetieth birthday party," said Bella. "That'll be your grandmother," said Louise, pointing to the photo. "How old is she?" Bella replied, "Her age, divided by my mother's, gives the same as my great-grandmother's age divided by my grandmother's. And my grandmother was the same age when my mother was born as my mother was when I was born." How old is Bella?

Bella is 20 years old

Bella is 17 years old

Bella is 24 years old