I am vry confused on this two questions

On their way home, what do claudia and jamie decide to do? a. visit the museum every week with mrs. frankweiler and make more discoveries about the exhibits b. tell saxonberg about the mystery behind the angel statue and give the sketch to the museum c. introduce mrs. frankweiler to their parents and tell her that they have adopted her as their grandmother d. visit mrs. frankweiler as often as they can and adopt her as their grandmother

Children begin to use tools at about what age? a. 18 months b. 2 years c. 1 year d. 6 months

Why have the aztec ruins in mexico city not been dug up?