Which of the following statements is TRUE about bacterial microcompartments such as the carboxysome? a. These bacterial microcompartments are the evolutionary precursor of mitochondria b. The passage of materials in and out of these bacterial microcompartments can be regulated through pores in the protein shell c. They are surrounded by 4 membranes, reflecting their evolutionary history of primary and secondary endocytosis d. These bacterial microcompartments are biomolecular condensates that form by liquid-liquid phase separation.