Respuesta :
The answer to this is letter A) mitochondria. Mitochondria is an organelle that is bounded or wrapped in a double membrane. These membranes or phospholipid bilayer contains embedded proteins. The outer layer is characterized to be smooth while the inner layer has cristae. These cristaes are the folds.
a She identifies an organelle having an outer and an inner membrane. She also notices that the outer membrane is smooth while the inner one is highly folded.